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 */
/*
 * Management Component Transport Protocol (MCTP)
 *
 * Copyright (c) 2021 Code Construct
 * Copyright (c) 2021 Google
 */

#ifndef __NET_MCTP_H
#define __NET_MCTP_H

#include <linux/bits.h>
#include <linux/mctp.h>
#include <net/net_namespace.h>
#include <net/sock.h>

/* MCTP packet definitions */
struct mctp_hdr {
	u8	ver;
	u8	dest;
	u8	src;
	u8	flags_seq_tag;
};

#define MCTP_VER_MIN	1
#define MCTP_VER_MAX	1

/* Definitions for flags_seq_tag field */
#define MCTP_HDR_FLAG_SOM	BIT(7)
#define MCTP_HDR_FLAG_EOM	BIT(6)
#define MCTP_HDR_FLAG_TO	BIT(3)
#define MCTP_HDR_FLAGS		GENMASK(5, 3)
#define MCTP_HDR_SEQ_SHIFT	4
#define MCTP_HDR_SEQ_MASK	GENMASK(1, 0)
#define MCTP_HDR_TAG_SHIFT	0
#define MCTP_HDR_TAG_MASK	GENMASK(2, 0)

#define MCTP_HEADER_MAXLEN	4

#define MCTP_INITIAL_DEFAULT_NET	1

static inline bool mctp_address_ok(mctp_eid_t eid)
{
	return eid >= 8 && eid < 255;
}

static inline struct mctp_hdr *mctp_hdr(struct sk_buff *skb)
{
	return (struct mctp_hdr *)skb_network_header(skb);
}

/* socket implementation */
struct mctp_sock {
	struct sock	sk;

/* bind() params */
	unsigned int	bind_net;
	mctp_eid_t	bind_addr;
	__u8		bind_type;

/* list of mctp_sk_key, for incoming tag lookup. updates protected
	 * by sk->net->keys_lock
	 */
	struct hlist_head keys;
};

/* Key for matching incoming packets to sockets or reassembly contexts.
 * Packets are matched on (src,dest,tag).
 *
 * Lifetime requirements:
 *
 *  - keys are free()ed via RCU
 *
 *  - a mctp_sk_key contains a reference to a struct sock; this is valid
 *    for the life of the key. On sock destruction (through unhash), the key is
 *    removed from lists (see below), and will not be observable after a RCU
 *    grace period.
 *
 *    any RX occurring within that grace period may still queue to the socket,
 *    but will hit the SOCK_DEAD case before the socket is freed.
 *
 * - these mctp_sk_keys appear on two lists:
 *     1) the struct mctp_sock->keys list
 *     2) the struct netns_mctp->keys list
 *
 *        updates to either list are performed under the netns_mctp->keys
 *        lock.
 *
 * - a key may have a sk_buff attached as part of an in-progress message
 *   reassembly (->reasm_head). The reassembly context is protected by
 *   reasm_lock, which may be acquired with the keys lock (above) held, if
 *   necessary. Consequently, keys lock *cannot* be acquired with the
 *   reasm_lock held.
 *
 * - there are two destruction paths for a mctp_sk_key:
 *
 *    - through socket unhash (see mctp_sk_unhash). This performs the list
 *      removal under keys_lock.
 *
 *    - where a key is established to receive a reply message: after receiving
 *      the (complete) reply, or during reassembly errors. Here, we clean up
 *      the reassembly context (marking reasm_dead, to prevent another from
 *      starting), and remove the socket from the netns & socket lists.
 */
struct mctp_sk_key {
	mctp_eid_t	peer_addr;
	mctp_eid_t	local_addr;
	__u8		tag; /* incoming tag match; invert TO for local */

/* we hold a ref to sk when set */
	struct sock	*sk;

/* routing lookup list */
	struct hlist_node hlist;

/* per-socket list */
	struct hlist_node sklist;

/* incoming fragment reassembly context */
	spinlock_t	reasm_lock;
	struct sk_buff	*reasm_head;
	struct sk_buff	**reasm_tailp;
	bool		reasm_dead;
	u8		last_seq;

struct rcu_head	rcu;
};

struct mctp_skb_cb {
	unsigned int	magic;
	unsigned int	net;
	mctp_eid_t	src;
};

/* skb control-block accessors with a little extra debugging for initial
 * development.
 *
 * TODO: remove checks & mctp_skb_cb->magic; replace callers of __mctp_cb
 * with mctp_cb().
 *
 * __mctp_cb() is only for the initial ingress code; we should see ->magic set
 * at all times after this.
 */
static inline struct mctp_skb_cb *__mctp_cb(struct sk_buff *skb)
{
	struct mctp_skb_cb *cb = (void *)skb->cb;

cb->magic = 0x4d435450;
	return cb;
}

static inline struct mctp_skb_cb *mctp_cb(struct sk_buff *skb)
{
	struct mctp_skb_cb *cb = (void *)skb->cb;

WARN_ON(cb->magic != 0x4d435450);
	return (void *)(skb->cb);
}

/* Route definition.
 *
 * These are held in the pernet->mctp.routes list, with RCU protection for
 * removed routes. We hold a reference to the netdev; routes need to be
 * dropped on NETDEV_UNREGISTER events.
 *
 * Updates to the route table are performed under rtnl; all reads under RCU,
 * so routes cannot be referenced over a RCU grace period. Specifically: A
 * caller cannot block between mctp_route_lookup and passing the route to
 * mctp_do_route.
 */
struct mctp_route {
	mctp_eid_t		min, max;

struct mctp_dev		*dev;
	unsigned int		mtu;
	unsigned char		type;
	int			(*output)(struct mctp_route *route,
					  struct sk_buff *skb);

struct list_head	list;
	refcount_t		refs;
	struct rcu_head		rcu;
};

/* route interfaces */
struct mctp_route *mctp_route_lookup(struct net *net, unsigned int dnet,
				     mctp_eid_t daddr);

int mctp_do_route(struct mctp_route *rt, struct sk_buff *skb);

int mctp_local_output(struct sock *sk, struct mctp_route *rt,
		      struct sk_buff *skb, mctp_eid_t daddr, u8 req_tag);

/* routing <--> device interface */
unsigned int mctp_default_net(struct net *net);
int mctp_default_net_set(struct net *net, unsigned int index);
int mctp_route_add_local(struct mctp_dev *mdev, mctp_eid_t addr);
int mctp_route_remove_local(struct mctp_dev *mdev, mctp_eid_t addr);
void mctp_route_remove_dev(struct mctp_dev *mdev);

/* neighbour definitions */
enum mctp_neigh_source {
	MCTP_NEIGH_STATIC,
	MCTP_NEIGH_DISCOVER,
};

struct mctp_neigh {
	struct mctp_dev		*dev;
	mctp_eid_t		eid;
	enum mctp_neigh_source	source;

unsigned char		ha[MAX_ADDR_LEN];

struct list_head	list;
	struct rcu_head		rcu;
};

int mctp_neigh_init(void);
void mctp_neigh_exit(void);

// ret_hwaddr may be NULL, otherwise must have space for MAX_ADDR_LEN
int mctp_neigh_lookup(struct mctp_dev *dev, mctp_eid_t eid,
		      void *ret_hwaddr);
void mctp_neigh_remove_dev(struct mctp_dev *mdev);

int mctp_routes_init(void);
void mctp_routes_exit(void);

int mctp_device_init(void);
void mctp_device_exit(void);

#endif /* __NET_MCTP_H */