Gecko [ tsuru-no-tsurugi.tokyo ]

Name	Size	Permission	Date
9p	[ DIR ]	drwxr-xr-x	2026-06-27 06:50
bluetooth	[ DIR ]	drwxr-xr-x	2026-06-27 06:50
caif	[ DIR ]	drwxr-xr-x	2026-06-27 06:50
iucv	[ DIR ]	drwxr-xr-x	2026-06-27 06:50
netfilter	[ DIR ]	drwxr-xr-x	2026-06-27 06:50
netns	[ DIR ]	drwxr-xr-x	2026-06-27 06:50
nfc	[ DIR ]	drwxr-xr-x	2026-06-27 06:50
phonet	[ DIR ]	drwxr-xr-x	2026-06-27 06:50
sctp	[ DIR ]	drwxr-xr-x	2026-06-27 06:50
tc_act	[ DIR ]	drwxr-xr-x	2026-06-27 06:50
6lowpan.h	10.03 KB	-rw-r--r--	2021-11-01 05:53
Space.h	737 B	-rw-r--r--	2021-11-01 05:53
act_api.h	8.44 KB	-rw-r--r--	2026-06-20 00:54
addrconf.h	14.25 KB	-rw-r--r--	2026-06-20 00:54
af_ieee802154.h	1.19 KB	-rw-r--r--	2021-11-01 05:53
af_rxrpc.h	2.73 KB	-rw-r--r--	2021-11-01 05:53
af_unix.h	3.3 KB	-rw-r--r--	2026-06-20 00:54
af_vsock.h	7.41 KB	-rw-r--r--	2026-06-20 00:54
ah.h	382 B	-rw-r--r--	2021-11-01 05:53
arp.h	2.09 KB	-rw-r--r--	2026-06-20 00:54
atmclip.h	1.48 KB	-rw-r--r--	2021-11-01 05:53
ax25.h	15.08 KB	-rw-r--r--	2026-06-20 00:54
ax88796.h	1.41 KB	-rw-r--r--	2021-11-01 05:53
bareudp.h	572 B	-rw-r--r--	2021-11-01 05:53
bond_3ad.h	9.48 KB	-rw-r--r--	2026-06-20 00:54
bond_alb.h	6.1 KB	-rw-r--r--	2026-06-20 00:54
bond_options.h	3.79 KB	-rw-r--r--	2026-06-20 00:54
bonding.h	19.79 KB	-rw-r--r--	2026-06-20 00:54
bpf_sk_storage.h	1.74 KB	-rw-r--r--	2021-11-01 05:53
busy_poll.h	3.87 KB	-rw-r--r--	2026-06-20 00:54
calipso.h	1.55 KB	-rw-r--r--	2021-11-01 05:53
cfg80211-wext.h	1.81 KB	-rw-r--r--	2021-11-01 05:53
cfg80211.h	294.25 KB	-rw-r--r--	2026-06-20 00:54
cfg802154.h	10.53 KB	-rw-r--r--	2026-06-20 00:54
checksum.h	4.75 KB	-rw-r--r--	2026-06-20 00:54
cipso_ipv4.h	7.37 KB	-rw-r--r--	2021-11-01 05:53
cls_cgroup.h	2.04 KB	-rw-r--r--	2026-06-20 00:54
codel.h	5.65 KB	-rw-r--r--	2021-11-01 05:53
codel_impl.h	7.98 KB	-rw-r--r--	2021-11-01 05:53
codel_qdisc.h	2.9 KB	-rw-r--r--	2021-11-01 05:53
compat.h	2.53 KB	-rw-r--r--	2021-11-01 05:53
datalink.h	619 B	-rw-r--r--	2021-11-01 05:53
dcbevent.h	742 B	-rw-r--r--	2021-11-01 05:53
dcbnl.h	4.22 KB	-rw-r--r--	2021-11-01 05:53
devlink.h	62.1 KB	-rw-r--r--	2021-11-01 05:53
dsa.h	35.38 KB	-rw-r--r--	2026-06-20 00:54
dsfield.h	1.12 KB	-rw-r--r--	2021-11-01 05:53
dst.h	14.8 KB	-rw-r--r--	2026-06-20 00:54
dst_cache.h	2.96 KB	-rw-r--r--	2026-06-20 00:54
dst_metadata.h	5.39 KB	-rw-r--r--	2026-06-20 00:54
dst_ops.h	2.08 KB	-rw-r--r--	2026-06-20 00:54
erspan.h	8.96 KB	-rw-r--r--	2021-11-01 05:53
esp.h	1.16 KB	-rw-r--r--	2021-11-01 05:53
espintcp.h	966 B	-rw-r--r--	2021-11-01 05:53
ethoc.h	391 B	-rw-r--r--	2021-11-01 05:53
failover.h	1.15 KB	-rw-r--r--	2021-11-01 05:53
fib_notifier.h	1.35 KB	-rw-r--r--	2021-11-01 05:53
fib_rules.h	6.3 KB	-rw-r--r--	2026-06-20 00:54
firewire.h	636 B	-rw-r--r--	2021-11-01 05:53
flow.h	5 KB	-rw-r--r--	2026-06-20 00:54
flow_dissector.h	10.27 KB	-rw-r--r--	2026-06-20 00:54
flow_offload.h	15.56 KB	-rw-r--r--	2026-06-20 00:54
fou.h	549 B	-rw-r--r--	2021-11-01 05:53
fq.h	2.47 KB	-rw-r--r--	2021-11-01 05:53
fq_impl.h	7.89 KB	-rw-r--r--	2021-11-01 05:53
garp.h	2.62 KB	-rw-r--r--	2021-11-01 05:53
gen_stats.h	2.82 KB	-rw-r--r--	2021-11-01 05:53
genetlink.h	13.53 KB	-rw-r--r--	2026-06-20 00:54
geneve.h	1.85 KB	-rw-r--r--	2021-11-01 05:53
gre.h	3.29 KB	-rw-r--r--	2021-11-01 05:53
gro.h	783 B	-rw-r--r--	2021-11-01 05:53
gro_cells.h	443 B	-rw-r--r--	2021-11-01 05:53
gtp.h	633 B	-rw-r--r--	2021-11-01 05:53
gue.h	3.24 KB	-rw-r--r--	2021-11-01 05:53
hwbm.h	969 B	-rw-r--r--	2021-11-01 05:53
icmp.h	1.87 KB	-rw-r--r--	2021-11-01 05:53
ieee80211_radiotap.h	13.2 KB	-rw-r--r--	2021-11-01 05:53
ieee802154_netdev.h	9.86 KB	-rw-r--r--	2026-06-20 00:54
if_inet6.h	6.54 KB	-rw-r--r--	2026-06-20 00:54
ife.h	1.03 KB	-rw-r--r--	2021-11-01 05:53
ila.h	291 B	-rw-r--r--	2021-11-01 05:53
inet6_connection_sock.h	765 B	-rw-r--r--	2021-11-01 05:53
inet6_hashtables.h	4.16 KB	-rw-r--r--	2026-06-20 00:54
inet_common.h	2.55 KB	-rw-r--r--	2021-11-01 05:53
inet_connection_sock.h	11.25 KB	-rw-r--r--	2026-06-20 00:54
inet_ecn.h	7.45 KB	-rw-r--r--	2021-11-01 05:53
inet_frag.h	4.93 KB	-rw-r--r--	2026-06-20 00:54
inet_hashtables.h	12.24 KB	-rw-r--r--	2026-06-20 00:54
inet_sock.h	9.76 KB	-rw-r--r--	2026-06-20 00:54
inet_timewait_sock.h	3.65 KB	-rw-r--r--	2021-11-01 05:53
inetpeer.h	3.29 KB	-rw-r--r--	2021-11-01 05:53
ioam6.h	1.22 KB	-rw-r--r--	2026-06-20 00:54
ip.h	22.23 KB	-rw-r--r--	2026-06-20 00:54
ip6_checksum.h	2.71 KB	-rw-r--r--	2021-11-01 05:53
ip6_fib.h	15.9 KB	-rw-r--r--	2026-06-20 00:54
ip6_route.h	9.99 KB	-rw-r--r--	2021-11-01 05:53
ip6_tunnel.h	4.98 KB	-rw-r--r--	2026-06-20 00:54
ip_fib.h	15.96 KB	-rw-r--r--	2026-06-20 00:54
ip_tunnels.h	15.58 KB	-rw-r--r--	2026-06-20 00:54
ip_vs.h	49.4 KB	-rw-r--r--	2026-06-20 00:54
ipcomp.h	659 B	-rw-r--r--	2021-11-01 05:53
ipconfig.h	811 B	-rw-r--r--	2021-11-01 05:53
ipv6.h	35.33 KB	-rw-r--r--	2026-06-20 00:54
ipv6_frag.h	3.28 KB	-rw-r--r--	2026-06-20 00:54
ipv6_stubs.h	3.4 KB	-rw-r--r--	2026-06-20 00:54
iw_handler.h	20.91 KB	-rw-r--r--	2021-11-01 05:53
kcm.h	4.84 KB	-rw-r--r--	2026-06-20 00:54
l3mdev.h	7.03 KB	-rw-r--r--	2026-06-20 00:54
lag.h	409 B	-rw-r--r--	2021-11-01 05:53
lapb.h	4.82 KB	-rw-r--r--	2026-06-20 00:54
lib80211.h	3.92 KB	-rw-r--r--	2021-11-01 05:53
llc.h	4.41 KB	-rw-r--r--	2026-06-20 00:54
llc_c_ac.h	9.31 KB	-rw-r--r--	2021-11-01 05:53
llc_c_ev.h	10.68 KB	-rw-r--r--	2021-11-01 05:53
llc_c_st.h	1.72 KB	-rw-r--r--	2021-11-01 05:53
llc_conn.h	4.06 KB	-rw-r--r--	2021-11-01 05:53
llc_if.h	2.16 KB	-rw-r--r--	2021-11-01 05:53
llc_pdu.h	14.35 KB	-rw-r--r--	2026-06-20 00:54
llc_s_ac.h	1.55 KB	-rw-r--r--	2021-11-01 05:53
llc_s_ev.h	2.2 KB	-rw-r--r--	2021-11-01 05:53
llc_s_st.h	947 B	-rw-r--r--	2021-11-01 05:53
llc_sap.h	1.08 KB	-rw-r--r--	2021-11-01 05:53
lwtunnel.h	6.65 KB	-rw-r--r--	2026-06-20 00:54
mac80211.h	267.55 KB	-rw-r--r--	2026-06-20 00:54
mac802154.h	14.88 KB	-rw-r--r--	2021-11-01 05:53
macsec.h	6.92 KB	-rw-r--r--	2026-06-20 00:54
mctp.h	6.01 KB	-rw-r--r--	2026-06-20 00:54
mctpdevice.h	841 B	-rw-r--r--	2026-06-20 00:54
mip6.h	1016 B	-rw-r--r--	2021-11-01 05:53
mld.h	2.85 KB	-rw-r--r--	2021-11-01 05:53
mpls.h	943 B	-rw-r--r--	2021-11-01 05:53
mpls_iptunnel.h	429 B	-rw-r--r--	2021-11-01 05:53
mptcp.h	6.62 KB	-rw-r--r--	2026-06-20 00:54
mrp.h	3.05 KB	-rw-r--r--	2026-06-20 00:54
ncsi.h	1.92 KB	-rw-r--r--	2021-11-01 05:53
ndisc.h	14.79 KB	-rw-r--r--	2026-06-20 00:54
neighbour.h	15.72 KB	-rw-r--r--	2026-06-20 00:54
net_failover.h	1023 B	-rw-r--r--	2021-11-01 05:53
net_namespace.h	12.5 KB	-rw-r--r--	2026-06-20 00:54
net_ratelimit.h	220 B	-rw-r--r--	2021-11-01 05:53
netevent.h	1.02 KB	-rw-r--r--	2021-11-01 05:53
netlabel.h	20.19 KB	-rw-r--r--	2026-06-20 00:54
netlink.h	60.21 KB	-rw-r--r--	2021-11-01 05:53
netprio_cgroup.h	1.02 KB	-rw-r--r--	2021-11-01 05:53
netrom.h	7.71 KB	-rw-r--r--	2021-11-01 05:53
nexthop.h	12.27 KB	-rw-r--r--	2021-11-01 05:53
nl802154.h	12.09 KB	-rw-r--r--	2026-06-20 00:54
nsh.h	12.31 KB	-rw-r--r--	2021-11-01 05:53
p8022.h	447 B	-rw-r--r--	2021-11-01 05:53
page_pool.h	8.44 KB	-rw-r--r--	2026-06-20 00:54
pie.h	3.6 KB	-rw-r--r--	2021-11-01 05:53
ping.h	2.9 KB	-rw-r--r--	2021-11-01 05:53
pkt_cls.h	23.86 KB	-rw-r--r--	2021-11-01 05:53
pkt_sched.h	5.9 KB	-rw-r--r--	2026-06-20 00:54
pptp.h	557 B	-rw-r--r--	2021-11-01 05:53
protocol.h	3.81 KB	-rw-r--r--	2026-06-20 00:54
psample.h	1.06 KB	-rw-r--r--	2021-11-01 05:53
psnap.h	351 B	-rw-r--r--	2021-11-01 05:53
raw.h	2.09 KB	-rw-r--r--	2026-06-20 00:54
rawv6.h	854 B	-rw-r--r--	2021-11-01 05:53
red.h	11.38 KB	-rw-r--r--	2021-11-01 05:53
regulatory.h	10.65 KB	-rw-r--r--	2021-11-01 05:53
request_sock.h	6.5 KB	-rw-r--r--	2026-06-20 00:54
rose.h	7.62 KB	-rw-r--r--	2021-11-01 05:53
route.h	11.31 KB	-rw-r--r--	2026-06-20 00:54
rpl.h	839 B	-rw-r--r--	2026-06-20 00:54
rsi_91x.h	1.67 KB	-rw-r--r--	2021-11-01 05:53
rtnetlink.h	7.46 KB	-rw-r--r--	2026-06-20 00:54
rtnh.h	859 B	-rw-r--r--	2021-11-01 05:53
sch_generic.h	33.91 KB	-rw-r--r--	2026-06-20 00:54
scm.h	3.79 KB	-rw-r--r--	2026-06-20 00:54
secure_seq.h	855 B	-rw-r--r--	2026-06-20 00:54
seg6.h	2.18 KB	-rw-r--r--	2026-06-20 00:54
seg6_hmac.h	1.44 KB	-rw-r--r--	2021-11-01 05:53
seg6_local.h	644 B	-rw-r--r--	2021-11-01 05:53
selftests.h	582 B	-rw-r--r--	2021-11-01 05:53
slhc_vj.h	6.67 KB	-rw-r--r--	2021-11-01 05:53
smc.h	2.45 KB	-rw-r--r--	2021-11-01 05:53
snmp.h	5.14 KB	-rw-r--r--	2021-11-01 05:53
sock.h	84.33 KB	-rw-r--r--	2026-06-20 00:54
sock_reuseport.h	1.83 KB	-rw-r--r--	2026-06-20 00:54
stp.h	383 B	-rw-r--r--	2021-11-01 05:53
strparser.h	4.15 KB	-rw-r--r--	2026-06-20 00:54
switchdev.h	14.27 KB	-rw-r--r--	2026-06-20 00:54
tcp.h	73.48 KB	-rw-r--r--	2026-06-20 00:54
tcp_states.h	1.2 KB	-rw-r--r--	2021-11-01 05:53
timewait_sock.h	925 B	-rw-r--r--	2021-11-01 05:53
tipc.h	2.35 KB	-rw-r--r--	2021-11-01 05:53
tls.h	20.96 KB	-rw-r--r--	2026-06-20 00:54
tls_toe.h	2.94 KB	-rw-r--r--	2021-11-01 05:53
transp_v6.h	1.95 KB	-rw-r--r--	2021-11-01 05:53
tso.h	566 B	-rw-r--r--	2021-11-01 05:53
tun_proto.h	988 B	-rw-r--r--	2021-11-01 05:53
udp.h	16.64 KB	-rw-r--r--	2026-06-20 00:54
udp_tunnel.h	11.92 KB	-rw-r--r--	2026-06-20 00:54
udplite.h	3.67 KB	-rw-r--r--	2026-06-20 00:54
vsock_addr.h	662 B	-rw-r--r--	2021-11-01 05:53
vxlan.h	14.09 KB	-rw-r--r--	2026-06-20 00:54
wext.h	1.47 KB	-rw-r--r--	2021-11-01 05:53
x25.h	9.49 KB	-rw-r--r--	2021-11-01 05:53
x25device.h	387 B	-rw-r--r--	2021-11-01 05:53
xdp.h	8.62 KB	-rw-r--r--	2026-06-20 00:54
xdp_priv.h	446 B	-rw-r--r--	2021-11-01 05:53
xdp_sock.h	2.04 KB	-rw-r--r--	2021-11-01 05:53
xdp_sock_drv.h	5.48 KB	-rw-r--r--	2026-06-20 00:54
xfrm.h	54.98 KB	-rw-r--r--	2026-06-20 00:54
xsk_buff_pool.h	5.02 KB	-rw-r--r--	2026-06-20 00:54

Rename

/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
 * NET		Generic infrastructure for Network protocols.
 *
 *		Definitions for request_sock
 *
 * Authors:	Arnaldo Carvalho de Melo <acme@conectiva.com.br>
 *
 * 		From code originally in include/net/tcp.h
 */
#ifndef _REQUEST_SOCK_H
#define _REQUEST_SOCK_H

#include <linux/slab.h>
#include <linux/spinlock.h>
#include <linux/types.h>
#include <linux/bug.h>
#include <linux/refcount.h>

#include <net/sock.h>

struct request_sock;
struct sk_buff;
struct dst_entry;
struct proto;

struct request_sock_ops {
	int		family;
	unsigned int	obj_size;
	struct kmem_cache	*slab;
	char		*slab_name;
	int		(*rtx_syn_ack)(const struct sock *sk,
				       struct request_sock *req);
	void		(*send_ack)(const struct sock *sk, struct sk_buff *skb,
				    struct request_sock *req);
	void		(*send_reset)(const struct sock *sk,
				      struct sk_buff *skb);
	void		(*destructor)(struct request_sock *req);
	void		(*syn_ack_timeout)(const struct request_sock *req);
};

int inet_rtx_syn_ack(const struct sock *parent, struct request_sock *req);

struct saved_syn {
	u32 mac_hdrlen;
	u32 network_hdrlen;
	u32 tcp_hdrlen;
	u8 data[];
};

/* struct request_sock - mini sock to represent a connection request
 */
struct request_sock {
	struct sock_common		__req_common;
#define rsk_refcnt			__req_common.skc_refcnt
#define rsk_hash			__req_common.skc_hash
#define rsk_listener			__req_common.skc_listener
#define rsk_window_clamp		__req_common.skc_window_clamp
#define rsk_rcv_wnd			__req_common.skc_rcv_wnd

struct request_sock		*dl_next;
	u16				mss;
	u8				num_retrans; /* number of retransmits */
	u8				syncookie:1; /* syncookie: encode tcpopts in timestamp */
	u8				num_timeout:7; /* number of timeouts */
	u32				ts_recent;
	struct timer_list		rsk_timer;
	const struct request_sock_ops	*rsk_ops;
	struct sock			*sk;
	struct saved_syn		*saved_syn;
	u32				secid;
	u32				peer_secid;
	u32				timeout;
};

static inline struct request_sock *inet_reqsk(const struct sock *sk)
{
	return (struct request_sock *)sk;
}

static inline struct sock *req_to_sk(struct request_sock *req)
{
	return (struct sock *)req;
}

static inline struct request_sock *
reqsk_alloc(const struct request_sock_ops *ops, struct sock *sk_listener,
	    bool attach_listener)
{
	struct request_sock *req;

req = kmem_cache_alloc(ops->slab, GFP_ATOMIC | __GFP_NOWARN);
	if (!req)
		return NULL;
	req->rsk_listener = NULL;
	if (attach_listener) {
		if (unlikely(!refcount_inc_not_zero(&sk_listener->sk_refcnt))) {
			kmem_cache_free(ops->slab, req);
			return NULL;
		}
		req->rsk_listener = sk_listener;
	}
	req->rsk_ops = ops;
	req_to_sk(req)->sk_prot = sk_listener->sk_prot;
	sk_node_init(&req_to_sk(req)->sk_node);
	sk_tx_queue_clear(req_to_sk(req));
	req->saved_syn = NULL;
	req->timeout = 0;
	req->num_timeout = 0;
	req->num_retrans = 0;
	req->sk = NULL;
	refcount_set(&req->rsk_refcnt, 0);

return req;
}

static inline void __reqsk_free(struct request_sock *req)
{
	req->rsk_ops->destructor(req);
	if (req->rsk_listener)
		sock_put(req->rsk_listener);
	kfree(req->saved_syn);
	kmem_cache_free(req->rsk_ops->slab, req);
}

static inline void reqsk_free(struct request_sock *req)
{
	WARN_ON_ONCE(refcount_read(&req->rsk_refcnt) != 0);
	__reqsk_free(req);
}

static inline void reqsk_put(struct request_sock *req)
{
	if (refcount_dec_and_test(&req->rsk_refcnt))
		reqsk_free(req);
}

/*
 * For a TCP Fast Open listener -
 *	lock - protects the access to all the reqsk, which is co-owned by
 *		the listener and the child socket.
 *	qlen - pending TFO requests (still in TCP_SYN_RECV).
 *	max_qlen - max TFO reqs allowed before TFO is disabled.
 *
 *	XXX (TFO) - ideally these fields can be made as part of "listen_sock"
 *	structure above. But there is some implementation difficulty due to
 *	listen_sock being part of request_sock_queue hence will be freed when
 *	a listener is stopped. But TFO related fields may continue to be
 *	accessed even after a listener is closed, until its sk_refcnt drops
 *	to 0 implying no more outstanding TFO reqs. One solution is to keep
 *	listen_opt around until	sk_refcnt drops to 0. But there is some other
 *	complexity that needs to be resolved. E.g., a listener can be disabled
 *	temporarily through shutdown()->tcp_disconnect(), and re-enabled later.
 */
struct fastopen_queue {
	struct request_sock	*rskq_rst_head; /* Keep track of past TFO */
	struct request_sock	*rskq_rst_tail; /* requests that caused RST.
						 * This is part of the defense
						 * against spoofing attack.
						 */
	spinlock_t	lock;
	int		qlen;		/* # of pending (TCP_SYN_RECV) reqs */
	int		max_qlen;	/* != 0 iff TFO is currently enabled */

struct tcp_fastopen_context __rcu *ctx; /* cipher context for cookie */
};

/** struct request_sock_queue - queue of request_socks
 *
 * @rskq_accept_head - FIFO head of established children
 * @rskq_accept_tail - FIFO tail of established children
 * @rskq_defer_accept - User waits for some data after accept()
 *
 */
struct request_sock_queue {
	spinlock_t		rskq_lock;
	u8			rskq_defer_accept;

u32			synflood_warned;
	atomic_t		qlen;
	atomic_t		young;

struct request_sock	*rskq_accept_head;
	struct request_sock	*rskq_accept_tail;
	struct fastopen_queue	fastopenq;  /* Check max_qlen != 0 to determine
					     * if TFO is enabled.
					     */
};

void reqsk_queue_alloc(struct request_sock_queue *queue);

void reqsk_fastopen_remove(struct sock *sk, struct request_sock *req,
			   bool reset);

static inline bool reqsk_queue_empty(const struct request_sock_queue *queue)
{
	return READ_ONCE(queue->rskq_accept_head) == NULL;
}

static inline struct request_sock *reqsk_queue_remove(struct request_sock_queue *queue,
						      struct sock *parent)
{
	struct request_sock *req;

spin_lock_bh(&queue->rskq_lock);
	req = queue->rskq_accept_head;
	if (req) {
		sk_acceptq_removed(parent);
		WRITE_ONCE(queue->rskq_accept_head, req->dl_next);
		if (queue->rskq_accept_head == NULL)
			queue->rskq_accept_tail = NULL;
	}
	spin_unlock_bh(&queue->rskq_lock);
	return req;
}

static inline void reqsk_queue_removed(struct request_sock_queue *queue,
				       const struct request_sock *req)
{
	if (req->num_timeout == 0)
		atomic_dec(&queue->young);
	atomic_dec(&queue->qlen);
}

static inline void reqsk_queue_added(struct request_sock_queue *queue)
{
	atomic_inc(&queue->young);
	atomic_inc(&queue->qlen);
}

static inline int reqsk_queue_len(const struct request_sock_queue *queue)
{
	return atomic_read(&queue->qlen);
}

static inline int reqsk_queue_len_young(const struct request_sock_queue *queue)
{
	return atomic_read(&queue->young);
}

#endif /* _REQUEST_SOCK_H */