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Name	Size	Permission
9p	[ DIR ]	drwxr-xr-x
bluetooth	[ DIR ]	drwxr-xr-x
caif	[ DIR ]	drwxr-xr-x
iucv	[ DIR ]	drwxr-xr-x
netfilter	[ DIR ]	drwxr-xr-x
netns	[ DIR ]	drwxr-xr-x
nfc	[ DIR ]	drwxr-xr-x
phonet	[ DIR ]	drwxr-xr-x
sctp	[ DIR ]	drwxr-xr-x
tc_act	[ DIR ]	drwxr-xr-x
6lowpan.h	10.03 KB	-rw-r--r--
Space.h	1.07 KB	-rw-r--r--
act_api.h	6.98 KB	-rw-r--r--
addrconf.h	14.1 KB	-rw-r--r--
af_ieee802154.h	1.19 KB	-rw-r--r--
af_rxrpc.h	2.65 KB	-rw-r--r--
af_unix.h	2.59 KB	-rw-r--r--
af_vsock.h	6.8 KB	-rw-r--r--
ah.h	382 B	-rw-r--r--
arp.h	2.09 KB	-rw-r--r--
atmclip.h	1.48 KB	-rw-r--r--
ax25.h	15.08 KB	-rw-r--r--
ax88796.h	1.31 KB	-rw-r--r--
bond_3ad.h	9.44 KB	-rw-r--r--
bond_alb.h	5.92 KB	-rw-r--r--
bond_options.h	3.74 KB	-rw-r--r--
bonding.h	19.63 KB	-rw-r--r--
bpf_sk_storage.h	558 B	-rw-r--r--
busy_poll.h	3.23 KB	-rw-r--r--
calipso.h	1.55 KB	-rw-r--r--
cfg80211-wext.h	1.81 KB	-rw-r--r--
cfg80211.h	265.02 KB	-rw-r--r--
cfg802154.h	10.51 KB	-rw-r--r--
checksum.h	4.67 KB	-rw-r--r--
cipso_ipv4.h	7.61 KB	-rw-r--r--
cls_cgroup.h	1.94 KB	-rw-r--r--
codel.h	5.65 KB	-rw-r--r--
codel_impl.h	7.98 KB	-rw-r--r--
codel_qdisc.h	2.9 KB	-rw-r--r--
compat.h	1.44 KB	-rw-r--r--
datalink.h	619 B	-rw-r--r--
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devlink.h	33.11 KB	-rw-r--r--
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dsfield.h	1.11 KB	-rw-r--r--
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esp.h	877 B	-rw-r--r--
ethoc.h	391 B	-rw-r--r--
failover.h	1.15 KB	-rw-r--r--
fib_notifier.h	1.28 KB	-rw-r--r--
fib_rules.h	5.48 KB	-rw-r--r--
firewire.h	636 B	-rw-r--r--
flow.h	5.92 KB	-rw-r--r--
flow_dissector.h	8.99 KB	-rw-r--r--
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fq.h	2.7 KB	-rw-r--r--
fq_impl.h	7 KB	-rw-r--r--
garp.h	2.62 KB	-rw-r--r--
gen_stats.h	2.7 KB	-rw-r--r--
genetlink.h	12.24 KB	-rw-r--r--
geneve.h	1.85 KB	-rw-r--r--
gre.h	3.3 KB	-rw-r--r--
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gtp.h	633 B	-rw-r--r--
gue.h	3.23 KB	-rw-r--r--
hwbm.h	969 B	-rw-r--r--
icmp.h	1.81 KB	-rw-r--r--
ieee80211_radiotap.h	13.04 KB	-rw-r--r--
ieee802154_netdev.h	9.86 KB	-rw-r--r--
if_inet6.h	6.19 KB	-rw-r--r--
ife.h	1.03 KB	-rw-r--r--
ila.h	291 B	-rw-r--r--
inet6_connection_sock.h	765 B	-rw-r--r--
inet6_hashtables.h	3.45 KB	-rw-r--r--
inet_common.h	2.27 KB	-rw-r--r--
inet_connection_sock.h	11.4 KB	-rw-r--r--
inet_ecn.h	7.5 KB	-rw-r--r--
inet_frag.h	4.9 KB	-rw-r--r--
inet_hashtables.h	13.77 KB	-rw-r--r--
inet_sock.h	9.48 KB	-rw-r--r--
inet_timewait_sock.h	3.65 KB	-rw-r--r--
inetpeer.h	3.29 KB	-rw-r--r--
ip.h	21.92 KB	-rw-r--r--
ip6_checksum.h	2.69 KB	-rw-r--r--
ip6_fib.h	13.23 KB	-rw-r--r--
ip6_route.h	9.89 KB	-rw-r--r--
ip6_tunnel.h	4.98 KB	-rw-r--r--
ip_fib.h	13.57 KB	-rw-r--r--
ip_tunnels.h	14.69 KB	-rw-r--r--
ip_vs.h	48.06 KB	-rw-r--r--
ipcomp.h	659 B	-rw-r--r--
ipconfig.h	811 B	-rw-r--r--
ipv6.h	32.75 KB	-rw-r--r--
ipv6_frag.h	2.65 KB	-rw-r--r--
ipv6_stubs.h	2.74 KB	-rw-r--r--
ipx.h	4.28 KB	-rw-r--r--
iw_handler.h	20.91 KB	-rw-r--r--
kcm.h	4.82 KB	-rw-r--r--
l3mdev.h	6.14 KB	-rw-r--r--
lag.h	409 B	-rw-r--r--
lapb.h	4.75 KB	-rw-r--r--
lib80211.h	3.92 KB	-rw-r--r--
llc.h	4.41 KB	-rw-r--r--
llc_c_ac.h	9.31 KB	-rw-r--r--
llc_c_ev.h	10.68 KB	-rw-r--r--
llc_c_st.h	1.72 KB	-rw-r--r--
llc_conn.h	4.06 KB	-rw-r--r--
llc_if.h	2.16 KB	-rw-r--r--
llc_pdu.h	14.35 KB	-rw-r--r--
llc_s_ac.h	1.55 KB	-rw-r--r--
llc_s_ev.h	2.2 KB	-rw-r--r--
llc_s_st.h	947 B	-rw-r--r--
llc_sap.h	1.08 KB	-rw-r--r--
lwtunnel.h	6.54 KB	-rw-r--r--
mac80211.h	250.97 KB	-rw-r--r--
mac802154.h	14.88 KB	-rw-r--r--
mip6.h	1017 B	-rw-r--r--
mld.h	2.8 KB	-rw-r--r--
mpls.h	535 B	-rw-r--r--
mpls_iptunnel.h	430 B	-rw-r--r--
mrp.h	3.05 KB	-rw-r--r--
ncsi.h	1.92 KB	-rw-r--r--
ndisc.h	14.77 KB	-rw-r--r--
neighbour.h	15.75 KB	-rw-r--r--
net_failover.h	1023 B	-rw-r--r--
net_namespace.h	11.96 KB	-rw-r--r--
net_ratelimit.h	220 B	-rw-r--r--
netevent.h	1.02 KB	-rw-r--r--
netlabel.h	20.14 KB	-rw-r--r--
netlink.h	56.77 KB	-rw-r--r--
netprio_cgroup.h	1.03 KB	-rw-r--r--
netrom.h	7.71 KB	-rw-r--r--
nexthop.h	7.58 KB	-rw-r--r--
nl802154.h	12.09 KB	-rw-r--r--
nsh.h	12.31 KB	-rw-r--r--
p8022.h	447 B	-rw-r--r--
page_pool.h	6.46 KB	-rw-r--r--
ping.h	2.9 KB	-rw-r--r--
pkt_cls.h	19.61 KB	-rw-r--r--
pkt_sched.h	4.61 KB	-rw-r--r--
pptp.h	557 B	-rw-r--r--
protocol.h	3.82 KB	-rw-r--r--
psample.h	888 B	-rw-r--r--
psnap.h	351 B	-rw-r--r--
raw.h	2.09 KB	-rw-r--r--
rawv6.h	854 B	-rw-r--r--
red.h	10.45 KB	-rw-r--r--
regulatory.h	10.89 KB	-rw-r--r--
request_sock.h	6.37 KB	-rw-r--r--
rose.h	7.62 KB	-rw-r--r--
route.h	10.87 KB	-rw-r--r--
rsi_91x.h	1.67 KB	-rw-r--r--
rtnetlink.h	6.28 KB	-rw-r--r--
rtnh.h	859 B	-rw-r--r--
sch_generic.h	32.97 KB	-rw-r--r--
scm.h	3.75 KB	-rw-r--r--
secure_seq.h	855 B	-rw-r--r--
seg6.h	1.57 KB	-rw-r--r--
seg6_hmac.h	1.44 KB	-rw-r--r--
seg6_local.h	644 B	-rw-r--r--
slhc_vj.h	6.67 KB	-rw-r--r--
smc.h	2.18 KB	-rw-r--r--
snmp.h	5.02 KB	-rw-r--r--
sock.h	75.38 KB	-rw-r--r--
sock_reuseport.h	1.58 KB	-rw-r--r--
stp.h	383 B	-rw-r--r--
strparser.h	4.03 KB	-rw-r--r--
switchdev.h	8 KB	-rw-r--r--
tcp.h	70.49 KB	-rw-r--r--
tcp_states.h	1.2 KB	-rw-r--r--
timewait_sock.h	925 B	-rw-r--r--
tipc.h	2.35 KB	-rw-r--r--
tls.h	19.86 KB	-rw-r--r--
transp_v6.h	2.05 KB	-rw-r--r--
tso.h	515 B	-rw-r--r--
tun_proto.h	988 B	-rw-r--r--
udp.h	14.71 KB	-rw-r--r--
udp_tunnel.h	5.37 KB	-rw-r--r--
udplite.h	3.67 KB	-rw-r--r--
vsock_addr.h	657 B	-rw-r--r--
vxlan.h	13.45 KB	-rw-r--r--
wext.h	1.47 KB	-rw-r--r--
wimax.h	19.36 KB	-rw-r--r--
x25.h	9.43 KB	-rw-r--r--
x25device.h	387 B	-rw-r--r--
xdp.h	5.32 KB	-rw-r--r--
xdp_priv.h	446 B	-rw-r--r--
xdp_sock.h	8.26 KB	-rw-r--r--
xfrm.h	53.07 KB	-rw-r--r--

Code Editor : inet_connection_sock.h

/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
 * NET		Generic infrastructure for INET connection oriented protocols.
 *
 *		Definitions for inet_connection_sock 
 *
 * Authors:	Many people, see the TCP sources
 *
 * 		From code originally in TCP
 */
#ifndef _INET_CONNECTION_SOCK_H
#define _INET_CONNECTION_SOCK_H

#include <linux/compiler.h>
#include <linux/string.h>
#include <linux/timer.h>
#include <linux/poll.h>
#include <linux/kernel.h>

#include <net/inet_sock.h>
#include <net/request_sock.h>

/* Cancel timers, when they are not required. */
#undef INET_CSK_CLEAR_TIMERS

struct inet_bind_bucket;
struct tcp_congestion_ops;

/*
 * Pointers to address related TCP functions
 * (i.e. things that depend on the address family)
 */
struct inet_connection_sock_af_ops {
	int	    (*queue_xmit)(struct sock *sk, struct sk_buff *skb, struct flowi *fl);
	void	    (*send_check)(struct sock *sk, struct sk_buff *skb);
	int	    (*rebuild_header)(struct sock *sk);
	void	    (*sk_rx_dst_set)(struct sock *sk, const struct sk_buff *skb);
	int	    (*conn_request)(struct sock *sk, struct sk_buff *skb);
	struct sock *(*syn_recv_sock)(const struct sock *sk, struct sk_buff *skb,
				      struct request_sock *req,
				      struct dst_entry *dst,
				      struct request_sock *req_unhash,
				      bool *own_req);
	u16	    net_header_len;
	u16	    net_frag_header_len;
	u16	    sockaddr_len;
	int	    (*setsockopt)(struct sock *sk, int level, int optname,
				  char __user *optval, unsigned int optlen);
	int	    (*getsockopt)(struct sock *sk, int level, int optname,
				  char __user *optval, int __user *optlen);
#ifdef CONFIG_COMPAT
	int	    (*compat_setsockopt)(struct sock *sk,
				int level, int optname,
				char __user *optval, unsigned int optlen);
	int	    (*compat_getsockopt)(struct sock *sk,
				int level, int optname,
				char __user *optval, int __user *optlen);
#endif
	void	    (*addr2sockaddr)(struct sock *sk, struct sockaddr *);
	void	    (*mtu_reduced)(struct sock *sk);
};

/** inet_connection_sock - INET connection oriented sock
 *
 * @icsk_accept_queue:	   FIFO of established children
 * @icsk_bind_hash:	   Bind node
 * @icsk_timeout:	   Timeout
 * @icsk_retransmit_timer: Resend (no ack)
 * @icsk_rto:		   Retransmit timeout
 * @icsk_pmtu_cookie	   Last pmtu seen by socket
 * @icsk_ca_ops		   Pluggable congestion control hook
 * @icsk_af_ops		   Operations which are AF_INET{4,6} specific
 * @icsk_ulp_ops	   Pluggable ULP control hook
 * @icsk_ulp_data	   ULP private data
 * @icsk_clean_acked	   Clean acked data hook
 * @icsk_listen_portaddr_node	hash to the portaddr listener hashtable
 * @icsk_ca_state:	   Congestion control state
 * @icsk_retransmits:	   Number of unrecovered [RTO] timeouts
 * @icsk_pending:	   Scheduled timer event
 * @icsk_backoff:	   Backoff
 * @icsk_syn_retries:      Number of allowed SYN (or equivalent) retries
 * @icsk_probes_out:	   unanswered 0 window probes
 * @icsk_ext_hdr_len:	   Network protocol overhead (IP/IPv6 options)
 * @icsk_ack:		   Delayed ACK control data
 * @icsk_mtup;		   MTU probing control data
 * @icsk_probes_tstamp:    Probe timestamp (cleared by non-zero window ack)
 * @icsk_user_timeout:	   TCP_USER_TIMEOUT value
 */
struct inet_connection_sock {
	/* inet_sock has to be the first member! */
	struct inet_sock	  icsk_inet;
	struct request_sock_queue icsk_accept_queue;
	struct inet_bind_bucket	  *icsk_bind_hash;
	unsigned long		  icsk_timeout;
 	struct timer_list	  icsk_retransmit_timer;
 	struct timer_list	  icsk_delack_timer;
	__u32			  icsk_rto;
	__u32			  icsk_pmtu_cookie;
	const struct tcp_congestion_ops *icsk_ca_ops;
	const struct inet_connection_sock_af_ops *icsk_af_ops;
	const struct tcp_ulp_ops  *icsk_ulp_ops;
	void __rcu		  *icsk_ulp_data;
	void (*icsk_clean_acked)(struct sock *sk, u32 acked_seq);
	struct hlist_node         icsk_listen_portaddr_node;
	unsigned int		  (*icsk_sync_mss)(struct sock *sk, u32 pmtu);
	__u8			  icsk_ca_state:6,
				  icsk_ca_setsockopt:1,
				  icsk_ca_dst_locked:1;
	__u8			  icsk_retransmits;
	__u8			  icsk_pending;
	__u8			  icsk_backoff;
	__u8			  icsk_syn_retries;
	__u8			  icsk_probes_out;
	__u16			  icsk_ext_hdr_len;
	struct {
		__u8		  pending;	 /* ACK is pending			   */
		__u8		  quick;	 /* Scheduled number of quick acks	   */
		__u8		  pingpong;	 /* The session is interactive		   */
		__u8		  blocked;	 /* Delayed ACK was blocked by socket lock */
		__u32		  ato;		 /* Predicted tick of soft clock	   */
		unsigned long	  timeout;	 /* Currently scheduled timeout		   */
		__u32		  lrcvtime;	 /* timestamp of last received data packet */
		__u16		  last_seg_size; /* Size of last incoming segment	   */
		__u16		  rcv_mss;	 /* MSS used for delayed ACK decisions	   */
	} icsk_ack;
	struct {
		int		  enabled;

/* Range of MTUs to search */
		int		  search_high;
		int		  search_low;

/* Information on the current probe. */
		int		  probe_size;

u32		  probe_timestamp;
	} icsk_mtup;
	u32			  icsk_probes_tstamp;
	u32			  icsk_user_timeout;

u64			  icsk_ca_priv[104 / sizeof(u64)];
#define ICSK_CA_PRIV_SIZE      (13 * sizeof(u64))
};

#define ICSK_TIME_RETRANS	1	/* Retransmit timer */
#define ICSK_TIME_DACK		2	/* Delayed ack timer */
#define ICSK_TIME_PROBE0	3	/* Zero window probe timer */
#define ICSK_TIME_EARLY_RETRANS 4	/* Early retransmit timer */
#define ICSK_TIME_LOSS_PROBE	5	/* Tail loss probe timer */
#define ICSK_TIME_REO_TIMEOUT	6	/* Reordering timer */

static inline struct inet_connection_sock *inet_csk(const struct sock *sk)
{
	return (struct inet_connection_sock *)sk;
}

static inline void *inet_csk_ca(const struct sock *sk)
{
	return (void *)inet_csk(sk)->icsk_ca_priv;
}

struct sock *inet_csk_clone_lock(const struct sock *sk,
				 const struct request_sock *req,
				 const gfp_t priority);

enum inet_csk_ack_state_t {
	ICSK_ACK_SCHED	= 1,
	ICSK_ACK_TIMER  = 2,
	ICSK_ACK_PUSHED = 4,
	ICSK_ACK_PUSHED2 = 8,
	ICSK_ACK_NOW = 16	/* Send the next ACK immediately (once) */
};

void inet_csk_init_xmit_timers(struct sock *sk,
			       void (*retransmit_handler)(struct timer_list *),
			       void (*delack_handler)(struct timer_list *),
			       void (*keepalive_handler)(struct timer_list *));
void inet_csk_clear_xmit_timers(struct sock *sk);
void inet_csk_clear_xmit_timers_sync(struct sock *sk);

static inline void inet_csk_schedule_ack(struct sock *sk)
{
	inet_csk(sk)->icsk_ack.pending |= ICSK_ACK_SCHED;
}

static inline int inet_csk_ack_scheduled(const struct sock *sk)
{
	return inet_csk(sk)->icsk_ack.pending & ICSK_ACK_SCHED;
}

static inline void inet_csk_delack_init(struct sock *sk)
{
	memset(&inet_csk(sk)->icsk_ack, 0, sizeof(inet_csk(sk)->icsk_ack));
}

void inet_csk_delete_keepalive_timer(struct sock *sk);
void inet_csk_reset_keepalive_timer(struct sock *sk, unsigned long timeout);

static inline void inet_csk_clear_xmit_timer(struct sock *sk, const int what)
{
	struct inet_connection_sock *icsk = inet_csk(sk);

if (what == ICSK_TIME_RETRANS || what == ICSK_TIME_PROBE0) {
		icsk->icsk_pending = 0;
#ifdef INET_CSK_CLEAR_TIMERS
		sk_stop_timer(sk, &icsk->icsk_retransmit_timer);
#endif
	} else if (what == ICSK_TIME_DACK) {
		icsk->icsk_ack.blocked = icsk->icsk_ack.pending = 0;
#ifdef INET_CSK_CLEAR_TIMERS
		sk_stop_timer(sk, &icsk->icsk_delack_timer);
#endif
	} else {
		pr_debug("inet_csk BUG: unknown timer value\n");
	}
}

/*
 *	Reset the retransmission timer
 */
static inline void inet_csk_reset_xmit_timer(struct sock *sk, const int what,
					     unsigned long when,
					     const unsigned long max_when)
{
	struct inet_connection_sock *icsk = inet_csk(sk);

if (when > max_when) {
		pr_debug("reset_xmit_timer: sk=%p %d when=0x%lx, caller=%p\n",
			 sk, what, when, (void *)_THIS_IP_);
		when = max_when;
	}

if (what == ICSK_TIME_RETRANS || what == ICSK_TIME_PROBE0 ||
	    what == ICSK_TIME_EARLY_RETRANS || what == ICSK_TIME_LOSS_PROBE ||
	    what == ICSK_TIME_REO_TIMEOUT) {
		icsk->icsk_pending = what;
		icsk->icsk_timeout = jiffies + when;
		sk_reset_timer(sk, &icsk->icsk_retransmit_timer, icsk->icsk_timeout);
	} else if (what == ICSK_TIME_DACK) {
		icsk->icsk_ack.pending |= ICSK_ACK_TIMER;
		icsk->icsk_ack.timeout = jiffies + when;
		sk_reset_timer(sk, &icsk->icsk_delack_timer, icsk->icsk_ack.timeout);
	} else {
		pr_debug("inet_csk BUG: unknown timer value\n");
	}
}

static inline unsigned long
inet_csk_rto_backoff(const struct inet_connection_sock *icsk,
		     unsigned long max_when)
{
        u64 when = (u64)icsk->icsk_rto << icsk->icsk_backoff;

return (unsigned long)min_t(u64, when, max_when);
}

struct sock *inet_csk_accept(struct sock *sk, int flags, int *err, bool kern);

int inet_csk_get_port(struct sock *sk, unsigned short snum);

struct dst_entry *inet_csk_route_req(const struct sock *sk, struct flowi4 *fl4,
				     const struct request_sock *req);
struct dst_entry *inet_csk_route_child_sock(const struct sock *sk,
					    struct sock *newsk,
					    const struct request_sock *req);

struct sock *inet_csk_reqsk_queue_add(struct sock *sk,
				      struct request_sock *req,
				      struct sock *child);
void inet_csk_reqsk_queue_hash_add(struct sock *sk, struct request_sock *req,
				   unsigned long timeout);
struct sock *inet_csk_complete_hashdance(struct sock *sk, struct sock *child,
					 struct request_sock *req,
					 bool own_req);

static inline void inet_csk_reqsk_queue_added(struct sock *sk)
{
	reqsk_queue_added(&inet_csk(sk)->icsk_accept_queue);
}

static inline int inet_csk_reqsk_queue_len(const struct sock *sk)
{
	return reqsk_queue_len(&inet_csk(sk)->icsk_accept_queue);
}

static inline int inet_csk_reqsk_queue_is_full(const struct sock *sk)
{
	return inet_csk_reqsk_queue_len(sk) >= sk->sk_max_ack_backlog;
}

bool inet_csk_reqsk_queue_drop(struct sock *sk, struct request_sock *req);
void inet_csk_reqsk_queue_drop_and_put(struct sock *sk, struct request_sock *req);

void inet_csk_destroy_sock(struct sock *sk);
void inet_csk_prepare_forced_close(struct sock *sk);

/*
 * LISTEN is a special case for poll..
 */
static inline __poll_t inet_csk_listen_poll(const struct sock *sk)
{
	return !reqsk_queue_empty(&inet_csk(sk)->icsk_accept_queue) ?
			(EPOLLIN | EPOLLRDNORM) : 0;
}

int inet_csk_listen_start(struct sock *sk, int backlog);
void inet_csk_listen_stop(struct sock *sk);

void inet_csk_addr2sockaddr(struct sock *sk, struct sockaddr *uaddr);

int inet_csk_compat_getsockopt(struct sock *sk, int level, int optname,
			       char __user *optval, int __user *optlen);
int inet_csk_compat_setsockopt(struct sock *sk, int level, int optname,
			       char __user *optval, unsigned int optlen);

/* update the fast reuse flag when adding a socket */
void inet_csk_update_fastreuse(struct inet_bind_bucket *tb,
			       struct sock *sk);

struct dst_entry *inet_csk_update_pmtu(struct sock *sk, u32 mtu);

#define TCP_PINGPONG_THRESH	3

static inline void inet_csk_enter_pingpong_mode(struct sock *sk)
{
	inet_csk(sk)->icsk_ack.pingpong = TCP_PINGPONG_THRESH;
}

static inline void inet_csk_exit_pingpong_mode(struct sock *sk)
{
	inet_csk(sk)->icsk_ack.pingpong = 0;
}

static inline bool inet_csk_in_pingpong_mode(struct sock *sk)
{
	return inet_csk(sk)->icsk_ack.pingpong >= TCP_PINGPONG_THRESH;
}

static inline void inet_csk_inc_pingpong_cnt(struct sock *sk)
{
	struct inet_connection_sock *icsk = inet_csk(sk);

if (icsk->icsk_ack.pingpong < U8_MAX)
		icsk->icsk_ack.pingpong++;
}

static inline void inet_init_csk_locks(struct sock *sk)
{
	struct inet_connection_sock *icsk = inet_csk(sk);

spin_lock_init(&icsk->icsk_accept_queue.rskq_lock);
	spin_lock_init(&icsk->icsk_accept_queue.fastopenq.lock);
}

#endif /* _INET_CONNECTION_SOCK_H */

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Code Editor : inet_connection_sock.h