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📄 if_ether.h(4.62 KB)
📄 igmp.c(98.93 KB)
📄 igmp.h(5.36 KB)
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📄 in_cksum.c(4.09 KB)
📄 in_debug.c(3.48 KB)
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📄 in_mcast.c(79.22 KB)
📄 in_pcb.c(90.89 KB)
📄 in_pcb.h(34.46 KB)
📄 in_pcbgroup.c(17.28 KB)
📄 in_prot.c(2.35 KB)
📄 in_proto.c(9.36 KB)
📄 in_rmx.c(4.99 KB)
📄 in_rss.c(11.27 KB)
📄 in_rss.h(2.42 KB)
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📄 in_var.h(15.4 KB)
📄 ip.h(7.37 KB)
📄 ip6.h(8.93 KB)
📄 ip_carp.c(53.25 KB)
📄 ip_carp.h(6.79 KB)
📄 ip_divert.c(21.74 KB)
📄 ip_divert.h(2.32 KB)
📄 ip_dummynet.h(8.94 KB)
📄 ip_ecn.c(5.83 KB)
📄 ip_ecn.h(2.1 KB)
📄 ip_encap.c(10.59 KB)
📄 ip_encap.h(3.13 KB)
📄 ip_fastfwd.c(13.79 KB)
📄 ip_fw.h(34.29 KB)
📄 ip_gre.c(15.28 KB)
📄 ip_icmp.c(31.15 KB)
📄 ip_icmp.h(8.52 KB)
📄 ip_id.c(9.78 KB)
📄 ip_input.c(37.16 KB)
📄 ip_mroute.c(75.86 KB)
📄 ip_mroute.h(13.66 KB)
📄 ip_options.c(19.9 KB)
📄 ip_options.h(2.61 KB)
📄 ip_output.c(40.67 KB)
📄 ip_reass.c(22.42 KB)
📄 ip_var.h(11.48 KB)
📁 khelp
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📄 pim.h(4.25 KB)
📄 pim_var.h(3.14 KB)
📄 raw_ip.c(28.58 KB)
📄 sctp.h(22.97 KB)
📄 sctp_asconf.c(100.05 KB)
📄 sctp_asconf.h(3.31 KB)
📄 sctp_auth.c(50.44 KB)
📄 sctp_auth.h(8.52 KB)
📄 sctp_bsd_addr.c(13.89 KB)
📄 sctp_bsd_addr.h(2.45 KB)
📄 sctp_cc_functions.c(68.75 KB)
📄 sctp_constants.h(34.12 KB)
📄 sctp_crc32.c(4.5 KB)
📄 sctp_crc32.h(2.07 KB)
📄 sctp_header.h(17.48 KB)
📄 sctp_indata.c(175.36 KB)
📄 sctp_indata.h(4.18 KB)
📄 sctp_input.c(183.57 KB)
📄 sctp_input.h(2.43 KB)
📄 sctp_kdtrace.c(7.51 KB)
📄 sctp_kdtrace.h(3.6 KB)
📄 sctp_lock_bsd.h(15.64 KB)
📄 sctp_module.c(5.16 KB)
📄 sctp_os.h(2.73 KB)
📄 sctp_os_bsd.h(15.04 KB)
📄 sctp_output.c(362.89 KB)
📄 sctp_output.h(6.38 KB)
📄 sctp_pcb.c(198.87 KB)
📄 sctp_pcb.h(19.31 KB)
📄 sctp_peeloff.c(5.74 KB)
📄 sctp_peeloff.h(2.05 KB)
📄 sctp_ss_functions.c(30.72 KB)
📄 sctp_structs.h(38.29 KB)
📄 sctp_syscalls.c(13.94 KB)
📄 sctp_sysctl.c(37.45 KB)
📄 sctp_sysctl.h(22.9 KB)
📄 sctp_timer.c(47.92 KB)
📄 sctp_timer.h(3.07 KB)
📄 sctp_uio.h(38.07 KB)
📄 sctp_usrreq.c(216.08 KB)
📄 sctp_var.h(12.21 KB)
📄 sctputil.c(212.13 KB)
📄 sctputil.h(11.69 KB)
📄 siftr.c(45.2 KB)
📄 tcp.h(18.3 KB)
📄 tcp_debug.c(5.9 KB)
📄 tcp_debug.h(2.65 KB)
📄 tcp_fastopen.c(37.98 KB)
📄 tcp_fastopen.h(3.7 KB)
📄 tcp_fsm.h(4.25 KB)
📄 tcp_hostcache.c(21.43 KB)
📄 tcp_hostcache.h(2.92 KB)
📄 tcp_hpts.c(57.55 KB)
📄 tcp_hpts.h(9.89 KB)
📄 tcp_input.c(115.95 KB)
📄 tcp_log_buf.c(76.37 KB)
📄 tcp_log_buf.h(14.88 KB)
📄 tcp_lro.c(36.38 KB)
📄 tcp_lro.h(4.43 KB)
📄 tcp_offload.c(5.48 KB)
📄 tcp_offload.h(2.09 KB)
📄 tcp_output.c(60.16 KB)
📄 tcp_pcap.c(12.67 KB)
📄 tcp_pcap.h(1.76 KB)
📄 tcp_ratelimit.c(43.8 KB)
📄 tcp_ratelimit.h(5.07 KB)
📄 tcp_reass.c(30.75 KB)
📄 tcp_sack.c(26.74 KB)
📄 tcp_seq.h(3.57 KB)
📁 tcp_stacks
📄 tcp_stats.c(8.47 KB)
📄 tcp_subr.c(92.74 KB)
📄 tcp_syncache.c(73 KB)
📄 tcp_syncache.h(5.16 KB)
📄 tcp_timer.c(31.04 KB)
📄 tcp_timer.h(9.29 KB)
📄 tcp_timewait.c(19.06 KB)
📄 tcp_usrreq.c(71.35 KB)
📄 tcp_var.h(43.48 KB)
📄 tcpip.h(2.29 KB)
📄 toecore.c(13.51 KB)
📄 toecore.h(5.13 KB)
📄 udp.h(2.49 KB)
📄 udp_usrreq.c(44.57 KB)
📄 udp_var.h(6.48 KB)
📄 udplite.h(1.91 KB)

Editing: toecore.c

/*-
 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
 *
 * Copyright (c) 2012 Chelsio Communications, Inc.
 * All rights reserved.
 * Written by: Navdeep Parhar <np@FreeBSD.org>
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");

#include "opt_inet.h"
#include "opt_inet6.h"

#include <sys/param.h>
#include <sys/eventhandler.h>
#include <sys/kernel.h>
#include <sys/systm.h>
#include <sys/malloc.h>
#include <sys/mbuf.h>
#include <sys/module.h>
#include <sys/types.h>
#include <sys/sockopt.h>
#include <sys/sysctl.h>
#include <sys/socket.h>

#include <net/ethernet.h>
#include <net/if.h>
#include <net/if_var.h>
#include <net/if_types.h>
#include <net/if_vlan_var.h>
#include <net/if_llatbl.h>
#include <net/route.h>

#include <netinet/if_ether.h>
#include <netinet/in.h>
#include <netinet/in_pcb.h>
#include <netinet/in_var.h>
#include <netinet6/in6_var.h>
#include <netinet6/in6_pcb.h>
#include <netinet6/nd6.h>
#define TCPSTATES
#include <netinet/tcp.h>
#include <netinet/tcp_fsm.h>
#include <netinet/tcp_timer.h>
#include <netinet/tcp_var.h>
#include <netinet/tcp_syncache.h>
#include <netinet/tcp_offload.h>
#include <netinet/toecore.h>

static struct mtx toedev_lock;
static TAILQ_HEAD(, toedev) toedev_list;
static eventhandler_tag listen_start_eh;
static eventhandler_tag listen_stop_eh;
static eventhandler_tag lle_event_eh;

static int
toedev_connect(struct toedev *tod __unused, struct socket *so __unused,
    struct nhop_object *nh __unused, struct sockaddr *nam __unused)
{

return (ENOTSUP);
}

static int
toedev_listen_start(struct toedev *tod __unused, struct tcpcb *tp __unused)
{

return (ENOTSUP);
}

static int
toedev_listen_stop(struct toedev *tod __unused, struct tcpcb *tp __unused)
{

return (ENOTSUP);
}

static void
toedev_input(struct toedev *tod __unused, struct tcpcb *tp __unused,
    struct mbuf *m)
{

m_freem(m);
	return;
}

static void
toedev_rcvd(struct toedev *tod __unused, struct tcpcb *tp __unused)
{

return;
}

static int
toedev_output(struct toedev *tod __unused, struct tcpcb *tp __unused)
{

return (ENOTSUP);
}

static void
toedev_pcb_detach(struct toedev *tod __unused, struct tcpcb *tp __unused)
{

return;
}

static void
toedev_l2_update(struct toedev *tod __unused, struct ifnet *ifp __unused,
    struct sockaddr *sa __unused, uint8_t *lladdr __unused,
    uint16_t vtag __unused)
{

return;
}

static void
toedev_route_redirect(struct toedev *tod __unused, struct ifnet *ifp __unused,
    struct nhop_object *nh0 __unused, struct nhop_object *nh1 __unused)
{

return;
}

static void
toedev_syncache_added(struct toedev *tod __unused, void *ctx __unused)
{

return;
}

static void
toedev_syncache_removed(struct toedev *tod __unused, void *ctx __unused)
{

return;
}

static int
toedev_syncache_respond(struct toedev *tod __unused, void *ctx __unused,
    struct mbuf *m)
{

m_freem(m);
	return (0);
}

static void
toedev_offload_socket(struct toedev *tod __unused, void *ctx __unused,
    struct socket *so __unused)
{

return;
}

static void
toedev_ctloutput(struct toedev *tod __unused, struct tcpcb *tp __unused,
    int sopt_dir __unused, int sopt_name __unused)
{

return;
}

static void
toedev_tcp_info(struct toedev *tod __unused, struct tcpcb *tp __unused,
    struct tcp_info *ti __unused)
{

return;
}

static int
toedev_alloc_tls_session(struct toedev *tod __unused, struct tcpcb *tp __unused,
    struct ktls_session *tls __unused, int direction __unused)
{

return (EINVAL);
}

/*
 * Inform one or more TOE devices about a listening socket.
 */
static void
toe_listen_start(struct inpcb *inp, void *arg)
{
	struct toedev *t, *tod;
	struct tcpcb *tp;

INP_WLOCK_ASSERT(inp);
	KASSERT(inp->inp_pcbinfo == &V_tcbinfo,
	    ("%s: inp is not a TCP inp", __func__));

if (inp->inp_flags & (INP_DROPPED | INP_TIMEWAIT))
		return;

tp = intotcpcb(inp);
	if (tp->t_state != TCPS_LISTEN)
		return;

t = arg;
	mtx_lock(&toedev_lock);
	TAILQ_FOREACH(tod, &toedev_list, link) {
		if (t == NULL || t == tod)
			tod->tod_listen_start(tod, tp);
	}
	mtx_unlock(&toedev_lock);
}

static void
toe_listen_start_event(void *arg __unused, struct tcpcb *tp)
{
	struct inpcb *inp = tp->t_inpcb;

INP_WLOCK_ASSERT(inp);
	KASSERT(tp->t_state == TCPS_LISTEN,
	    ("%s: t_state %s", __func__, tcpstates[tp->t_state]));

toe_listen_start(inp, NULL);
}

static void
toe_listen_stop_event(void *arg __unused, struct tcpcb *tp)
{
	struct toedev *tod;
#ifdef INVARIANTS
	struct inpcb *inp = tp->t_inpcb;
#endif

INP_WLOCK_ASSERT(inp);
	KASSERT(tp->t_state == TCPS_LISTEN,
	    ("%s: t_state %s", __func__, tcpstates[tp->t_state]));

mtx_lock(&toedev_lock);
	TAILQ_FOREACH(tod, &toedev_list, link)
	    tod->tod_listen_stop(tod, tp);
	mtx_unlock(&toedev_lock);
}

/*
 * Fill up a freshly allocated toedev struct with reasonable defaults.
 */
void
init_toedev(struct toedev *tod)
{

tod->tod_softc = NULL;

/*
	 * Provide no-op defaults so that the kernel can call any toedev
	 * function without having to check whether the TOE driver supplied one
	 * or not.
	 */
	tod->tod_connect = toedev_connect;
	tod->tod_listen_start = toedev_listen_start;
	tod->tod_listen_stop = toedev_listen_stop;
	tod->tod_input = toedev_input;
	tod->tod_rcvd = toedev_rcvd;
	tod->tod_output = toedev_output;
	tod->tod_send_rst = toedev_output;
	tod->tod_send_fin = toedev_output;
	tod->tod_pcb_detach = toedev_pcb_detach;
	tod->tod_l2_update = toedev_l2_update;
	tod->tod_route_redirect = toedev_route_redirect;
	tod->tod_syncache_added = toedev_syncache_added;
	tod->tod_syncache_removed = toedev_syncache_removed;
	tod->tod_syncache_respond = toedev_syncache_respond;
	tod->tod_offload_socket = toedev_offload_socket;
	tod->tod_ctloutput = toedev_ctloutput;
	tod->tod_tcp_info = toedev_tcp_info;
	tod->tod_alloc_tls_session = toedev_alloc_tls_session;
}

/*
 * Register an active TOE device with the system.  This allows it to receive
 * notifications from the kernel.
 */
int
register_toedev(struct toedev *tod)
{
	struct toedev *t;

mtx_lock(&toedev_lock);
	TAILQ_FOREACH(t, &toedev_list, link) {
		if (t == tod) {
			mtx_unlock(&toedev_lock);
			return (EEXIST);
		}
	}

TAILQ_INSERT_TAIL(&toedev_list, tod, link);
	registered_toedevs++;
	mtx_unlock(&toedev_lock);

inp_apply_all(toe_listen_start, tod);

return (0);
}

/*
 * Remove the TOE device from the global list of active TOE devices.  It is the
 * caller's responsibility to ensure that the TOE device is quiesced prior to
 * this call.
 */
int
unregister_toedev(struct toedev *tod)
{
	struct toedev *t, *t2;
	int rc = ENODEV;

mtx_lock(&toedev_lock);
	TAILQ_FOREACH_SAFE(t, &toedev_list, link, t2) {
		if (t == tod) {
			TAILQ_REMOVE(&toedev_list, tod, link);
			registered_toedevs--;
			rc = 0;
			break;
		}
	}
	KASSERT(registered_toedevs >= 0,
	    ("%s: registered_toedevs (%d) < 0", __func__, registered_toedevs));
	mtx_unlock(&toedev_lock);
	return (rc);
}

void
toe_syncache_add(struct in_conninfo *inc, struct tcpopt *to, struct tcphdr *th,
    struct inpcb *inp, void *tod, void *todctx, uint8_t iptos)
{
	struct socket *lso = inp->inp_socket;

INP_WLOCK_ASSERT(inp);

syncache_add(inc, to, th, inp, &lso, NULL, tod, todctx, iptos);
}

int
toe_syncache_expand(struct in_conninfo *inc, struct tcpopt *to,
    struct tcphdr *th, struct socket **lsop)
{

NET_EPOCH_ASSERT();

return (syncache_expand(inc, to, th, lsop, NULL));
}

/*
 * General purpose check to see if a 4-tuple is in use by the kernel.  If a TCP
 * header (presumably for an incoming SYN) is also provided, an existing 4-tuple
 * in TIME_WAIT may be assassinated freeing it up for re-use.
 *
 * Note that the TCP header must have been run through tcp_fields_to_host() or
 * equivalent.
 */
int
toe_4tuple_check(struct in_conninfo *inc, struct tcphdr *th, struct ifnet *ifp)
{
	struct inpcb *inp;

if (inc->inc_flags & INC_ISIPV6) {
		inp = in6_pcblookup(&V_tcbinfo, &inc->inc6_faddr,
		    inc->inc_fport, &inc->inc6_laddr, inc->inc_lport,
		    INPLOOKUP_WLOCKPCB, ifp);
	} else {
		inp = in_pcblookup(&V_tcbinfo, inc->inc_faddr, inc->inc_fport,
		    inc->inc_laddr, inc->inc_lport, INPLOOKUP_WLOCKPCB, ifp);
	}
	if (inp != NULL) {
		INP_WLOCK_ASSERT(inp);

if ((inp->inp_flags & INP_TIMEWAIT) && th != NULL) {
			if (!tcp_twcheck(inp, NULL, th, NULL, 0))
				return (EADDRINUSE);
		} else {
			INP_WUNLOCK(inp);
			return (EADDRINUSE);
		}
	}

return (0);
}

static void
toe_lle_event(void *arg __unused, struct llentry *lle, int evt)
{
	struct toedev *tod;
	struct ifnet *ifp;
	struct sockaddr *sa;
	uint8_t *lladdr;
	uint16_t vid, pcp;
	int family;
	struct sockaddr_in6 sin6;

LLE_WLOCK_ASSERT(lle);

ifp = lltable_get_ifp(lle->lle_tbl);
	family = lltable_get_af(lle->lle_tbl);

if (family != AF_INET && family != AF_INET6)
		return;
	/*
	 * Not interested if the interface's TOE capability is not enabled.
	 */
	if ((family == AF_INET && !(ifp->if_capenable & IFCAP_TOE4)) ||
	    (family == AF_INET6 && !(ifp->if_capenable & IFCAP_TOE6)))
		return;

tod = TOEDEV(ifp);
	if (tod == NULL)
		return;

sa = (struct sockaddr *)&sin6;
	lltable_fill_sa_entry(lle, sa);

vid = 0xfff;
	pcp = 0;
	if (evt != LLENTRY_RESOLVED) {
		/*
		 * LLENTRY_TIMEDOUT, LLENTRY_DELETED, LLENTRY_EXPIRED all mean
		 * this entry is going to be deleted.
		 */

lladdr = NULL;
	} else {
		KASSERT(lle->la_flags & LLE_VALID,
		    ("%s: %p resolved but not valid?", __func__, lle));

lladdr = (uint8_t *)lle->ll_addr;
		VLAN_TAG(ifp, &vid);
		VLAN_PCP(ifp, &pcp);
	}

tod->tod_l2_update(tod, ifp, sa, lladdr, EVL_MAKETAG(vid, pcp, 0));
}

/*
 * Returns 0 or EWOULDBLOCK on success (any other value is an error).  0 means
 * lladdr and vtag are valid on return, EWOULDBLOCK means the TOE driver's
 * tod_l2_update will be called later, when the entry is resolved or times out.
 */
int
toe_l2_resolve(struct toedev *tod, struct ifnet *ifp, struct sockaddr *sa,
    uint8_t *lladdr, uint16_t *vtag)
{
	int rc;
	uint16_t vid, pcp;

switch (sa->sa_family) {
#ifdef INET
	case AF_INET:
		rc = arpresolve(ifp, 0, NULL, sa, lladdr, NULL, NULL);
		break;
#endif
#ifdef INET6
	case AF_INET6:
		rc = nd6_resolve(ifp, 0, NULL, sa, lladdr, NULL, NULL);
		break;
#endif
	default:
		return (EPROTONOSUPPORT);
	}

if (rc == 0) {
		vid = 0xfff;
		pcp = 0;
		if (ifp->if_type == IFT_L2VLAN) {
			VLAN_TAG(ifp, &vid);
			VLAN_PCP(ifp, &pcp);
		} else if (ifp->if_pcp != IFNET_PCP_NONE) {
			vid = 0;
			pcp = ifp->if_pcp;
		}
		*vtag = EVL_MAKETAG(vid, pcp, 0);
	}

return (rc);
}

void
toe_connect_failed(struct toedev *tod, struct inpcb *inp, int err)
{

NET_EPOCH_ASSERT();
	INP_WLOCK_ASSERT(inp);

if (!(inp->inp_flags & INP_DROPPED)) {
		struct tcpcb *tp = intotcpcb(inp);

KASSERT(tp->t_flags & TF_TOE,
		    ("%s: tp %p not offloaded.", __func__, tp));

if (err == EAGAIN) {
			/*
			 * Temporary failure during offload, take this PCB back.
			 * Detach from the TOE driver and do the rest of what
			 * TCP's pru_connect would have done if the connection
			 * wasn't offloaded.
			 */

tod->tod_pcb_detach(tod, tp);
			KASSERT(!(tp->t_flags & TF_TOE),
			    ("%s: tp %p still offloaded.", __func__, tp));
			tcp_timer_activate(tp, TT_KEEP, TP_KEEPINIT(tp));
			(void) tp->t_fb->tfb_tcp_output(tp);
		} else {
			tp = tcp_drop(tp, err);
			if (tp == NULL)
				INP_WLOCK(inp);	/* re-acquire */
		}
	}
	INP_WLOCK_ASSERT(inp);
}

static int
toecore_load(void)
{

mtx_init(&toedev_lock, "toedev lock", NULL, MTX_DEF);
	TAILQ_INIT(&toedev_list);

listen_start_eh = EVENTHANDLER_REGISTER(tcp_offload_listen_start,
	    toe_listen_start_event, NULL, EVENTHANDLER_PRI_ANY);
	listen_stop_eh = EVENTHANDLER_REGISTER(tcp_offload_listen_stop,
	    toe_listen_stop_event, NULL, EVENTHANDLER_PRI_ANY);
	lle_event_eh = EVENTHANDLER_REGISTER(lle_event, toe_lle_event, NULL,
	    EVENTHANDLER_PRI_ANY);

return (0);
}

static int
toecore_unload(void)
{

mtx_lock(&toedev_lock);
	if (!TAILQ_EMPTY(&toedev_list)) {
		mtx_unlock(&toedev_lock);
		return (EBUSY);
	}

EVENTHANDLER_DEREGISTER(tcp_offload_listen_start, listen_start_eh);
	EVENTHANDLER_DEREGISTER(tcp_offload_listen_stop, listen_stop_eh);
	EVENTHANDLER_DEREGISTER(lle_event, lle_event_eh);

mtx_unlock(&toedev_lock);
	mtx_destroy(&toedev_lock);

return (0);
}

static int
toecore_mod_handler(module_t mod, int cmd, void *arg)
{

if (cmd == MOD_LOAD)
		return (toecore_load());

if (cmd == MOD_UNLOAD)
		return (toecore_unload());

return (EOPNOTSUPP);
}

static moduledata_t mod_data= {
	"toecore",
	toecore_mod_handler,
	0
};

MODULE_VERSION(toecore, 1);
DECLARE_MODULE(toecore, mod_data, SI_SUB_EXEC, SI_ORDER_ANY);

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