39#include "opt_tcpdebug.h"
40#include "opt_ratelimit.h"
42#include <sys/kernel.h>
43#include <sys/malloc.h>
45#include <sys/socket.h>
46#include <sys/socketvar.h>
47#include <sys/sysctl.h>
48#include <sys/eventhandler.h>
52#include <net/if_var.h>
58#include <netinet6/tcp6_var.h>
63#ifndef USECS_IN_SECOND
64#define USECS_IN_SECOND 1000000
153#define COMMON_RATE 180500
154const uint64_t desired_rates[] = {
232#define MAX_HDWR_RATES (sizeof(desired_rates)/sizeof(uint64_t))
233#define RS_ORDERED_COUNT 16
238#define RS_NEXT_ORDER_GROUP 16
243#define ALL_HARDWARE_RATES 1004
249#define RS_ONE_MEGABIT_PERSEC 1000000
250#define RS_ONE_GIGABIT_PERSEC 1000000000
251#define RS_TEN_GIGABIT_PERSEC 10000000000
253static struct head_tcp_rate_set int_rs;
254static struct mtx rs_mtx;
258static uint32_t wait_time_floor = 8000;
259static uint32_t rs_hw_floor_mss = 16;
260static uint32_t num_of_waits_allowed = 1;
262SYSCTL_NODE(_net_inet_tcp, OID_AUTO, rl, CTLFLAG_RW | CTLFLAG_MPSAFE, 0,
263 "TCP Ratelimit stats");
264SYSCTL_UINT(_net_inet_tcp_rl, OID_AUTO, alive, CTLFLAG_RW,
266 "Number of interfaces initialized for ratelimiting");
267SYSCTL_UINT(_net_inet_tcp_rl, OID_AUTO, dead, CTLFLAG_RW,
269 "Number of interfaces departing from ratelimiting");
270SYSCTL_UINT(_net_inet_tcp_rl, OID_AUTO, floor_mss, CTLFLAG_RW,
272 "Number of MSS that will override the normal minimums (0 means don't enforce)");
273SYSCTL_UINT(_net_inet_tcp_rl, OID_AUTO, wait_floor, CTLFLAG_RW,
274 &wait_time_floor, 2000,
275 "Has b/w increases what is the wait floor we are willing to wait at the end?");
276SYSCTL_UINT(_net_inet_tcp_rl, OID_AUTO, time_blocks, CTLFLAG_RW,
277 &num_of_waits_allowed, 1,
278 "How many time blocks on the end should software pacing be willing to wait?");
280SYSCTL_UINT(_net_inet_tcp_rl, OID_AUTO, hw_floor_mss, CTLFLAG_RW,
281 &rs_hw_floor_mss, 16,
282 "Number of mss that are a minum for hardware pacing?");
286rl_add_syctl_entries(
struct sysctl_oid *rl_sysctl_root,
struct tcp_rate_set *rs)
293 SYSCTL_CHILDREN(rl_sysctl_root),
294 OID_AUTO,
"disable", CTLFLAG_RD,
296 "Disable this interface from new hdwr limiting?");
299 SYSCTL_CHILDREN(rl_sysctl_root),
300 OID_AUTO,
"disable", CTLFLAG_RW,
302 "Disable this interface from new hdwr limiting?");
305 SYSCTL_CHILDREN(rl_sysctl_root),
306 OID_AUTO,
"minseg", CTLFLAG_RW,
308 "What is the minimum we need to send on this interface?");
310 SYSCTL_CHILDREN(rl_sysctl_root),
311 OID_AUTO,
"flow_limit", CTLFLAG_RW,
313 "What is the limit for number of flows (0=unlimited)?");
315 SYSCTL_CHILDREN(rl_sysctl_root),
316 OID_AUTO,
"highest", CTLFLAG_RD,
318 "Highest valid rate");
320 SYSCTL_CHILDREN(rl_sysctl_root),
321 OID_AUTO,
"lowest", CTLFLAG_RD,
323 "Lowest valid rate");
325 SYSCTL_CHILDREN(rl_sysctl_root),
326 OID_AUTO,
"flags", CTLFLAG_RD,
328 "What lags are on the entry?");
330 SYSCTL_CHILDREN(rl_sysctl_root),
331 OID_AUTO,
"numrates", CTLFLAG_RD,
333 "How many rates re there?");
335 SYSCTL_CHILDREN(rl_sysctl_root),
336 OID_AUTO,
"flows_using", CTLFLAG_RD,
338 "How many flows are using this interface now?");
339#ifdef DETAILED_RATELIMIT_SYSCTL
343 struct sysctl_oid *rl_rates;
344 struct sysctl_oid *rl_rate_num;
347 SYSCTL_CHILDREN(rl_sysctl_root),
350 CTLFLAG_RW | CTLFLAG_MPSAFE, 0,
353 sprintf(rate_num,
"%d", i);
354 rl_rate_num = SYSCTL_ADD_NODE(&rs->
sysctl_ctx,
355 SYSCTL_CHILDREN(rl_rates),
358 CTLFLAG_RW | CTLFLAG_MPSAFE, 0,
361 SYSCTL_CHILDREN(rl_rate_num),
362 OID_AUTO,
"flags", CTLFLAG_RD,
364 "Flags on this rate");
366 SYSCTL_CHILDREN(rl_rate_num),
367 OID_AUTO,
"pacetime", CTLFLAG_RD,
369 "Time hardware inserts between 1500 byte sends");
371 SYSCTL_CHILDREN(rl_rate_num),
372 OID_AUTO,
"rate", CTLFLAG_RD,
374 "Rate in bytes per second");
376 SYSCTL_CHILDREN(rl_rate_num),
377 OID_AUTO,
"using", CTLFLAG_RD,
379 "Number of flows using");
381 SYSCTL_CHILDREN(rl_rate_num),
382 OID_AUTO,
"enobufs", CTLFLAG_RD,
384 "Number of enobufs logged on this rate");
392rs_destroy(epoch_context_t ctx)
423 free(rs->
rs_rlt, M_TCPPACE);
432 mtx_assert(&rs_mtx, MA_OWNED);
446extern counter_u64_t rate_limit_new;
447extern counter_u64_t rate_limit_chg;
448extern counter_u64_t rate_limit_set_ok;
449extern counter_u64_t rate_limit_active;
450extern counter_u64_t rate_limit_alloc_fail;
454rl_attach_txrtlmt(
struct ifnet *ifp,
458 struct m_snd_tag **tag)
461 union if_snd_tag_alloc_params params = {
462 .rate_limit.hdr.type = IF_SND_TAG_TYPE_RATE_LIMIT,
463 .rate_limit.hdr.flowid = flowid,
464 .rate_limit.hdr.flowtype = flowtype,
465 .rate_limit.max_rate = cfg_rate,
466 .rate_limit.flags = M_NOWAIT,
469 error = m_snd_tag_alloc(ifp, ¶ms, tag);
472 counter_u64_add(rate_limit_set_ok, 1);
473 counter_u64_add(rate_limit_active, 1);
474 }
else if (error != EOPNOTSUPP)
475 counter_u64_add(rate_limit_alloc_fail, 1);
481populate_canned_table(
struct tcp_rate_set *rs,
const uint64_t *rate_table_act)
491 int i, at_low, at_high;
492 uint8_t low_disabled = 0, high_disabled = 0;
494 for(i = 0, at_low = 0, at_high = RS_NEXT_ORDER_GROUP; i < rs->
rs_rate_cnt; i++) {
497 if ((low_disabled == 0) &&
499 (rate_table_act[at_low] < rate_table_act[at_high]))) {
502 if (at_low == RS_NEXT_ORDER_GROUP)
504 }
else if (high_disabled == 0) {
507 if (at_high == MAX_HDWR_RATES)
514rt_setup_new_rs(
struct ifnet *ifp,
int *error)
517 const uint64_t *rate_table_act;
518 uint64_t lentim, res;
522 struct if_ratelimit_query_results rl;
523 struct sysctl_oid *rl_sysctl_root;
524 struct epoch_tracker et;
530 if (ifp->if_ratelimit_query == NULL) {
535 printf(
"Warning:No query functions for %s:%d-- failed\n",
536 ifp->if_dname, ifp->if_dunit);
539 rs = malloc(
sizeof(
struct tcp_rate_set), M_TCPPACE, M_NOWAIT | M_ZERO);
543 printf(
"Warning:No memory for malloc of tcp_rate_set\n");
546 memset(&rl, 0,
sizeof(rl));
547 rl.flags = RT_NOSUPPORT;
548 ifp->if_ratelimit_query(ifp, &rl);
549 if (rl.flags & RT_IS_UNUSABLE) {
561 rl_sysctl_root = SYSCTL_ADD_NODE(&rs->
sysctl_ctx,
562 SYSCTL_STATIC_CHILDREN(_net_inet_tcp_rl),
565 CTLFLAG_RW | CTLFLAG_MPSAFE, 0,
567 rl_add_syctl_entries(rl_sysctl_root, rs);
570 CK_LIST_INSERT_HEAD(&int_rs, rs,
next);
574 }
else if ((rl.flags & RT_IS_INDIRECT) == RT_IS_INDIRECT) {
581 rl_sysctl_root = SYSCTL_ADD_NODE(&rs->
sysctl_ctx,
582 SYSCTL_STATIC_CHILDREN(_net_inet_tcp_rl),
585 CTLFLAG_RW | CTLFLAG_MPSAFE, 0,
587 rl_add_syctl_entries(rl_sysctl_root, rs);
590 CK_LIST_INSERT_HEAD(&int_rs, rs,
next);
594 }
else if ((rl.flags & RT_IS_FIXED_TABLE) == RT_IS_FIXED_TABLE) {
604 rate_table_act = rl.rate_table;
605 }
else if ((rl.flags & RT_IS_SELECTABLE) == RT_IS_SELECTABLE) {
613 rate_table_act = desired_rates;
633 rs->
rs_rlt = malloc(sz, M_TCPPACE, M_NOWAIT);
654 for(i = 3, rat = 125000; i< (ALL_HARDWARE_RATES-1); i++) {
658 rs->
rs_rlt[(ALL_HARDWARE_RATES-1)].
rate = 1250000000;
661 populate_canned_table(rs, rate_table_act);
698 if ((rl.flags & RT_IS_SETUP_REQ) &&
699 (ifp->if_ratelimit_query)) {
700 err = ifp->if_ratelimit_setup(ifp,
706 hash_type = M_HASHTYPE_RSS_TCP_IPV4;
708 hash_type = M_HASHTYPE_OPAQUE_HASH;
710 err = rl_attach_txrtlmt(ifp,
722 free(rs->
rs_rlt, M_TCPPACE);
741 free(rs->
rs_rlt, M_TCPPACE);
746 rl_sysctl_root = SYSCTL_ADD_NODE(&rs->
sysctl_ctx,
747 SYSCTL_STATIC_CHILDREN(_net_inet_tcp_rl),
750 CTLFLAG_RW | CTLFLAG_MPSAFE, 0,
752 rl_add_syctl_entries(rl_sysctl_root, rs);
755 CK_LIST_INSERT_HEAD(&int_rs, rs,
next);
766tcp_int_find_suitable_rate(
const volatile struct tcp_rate_set *rs,
767 uint64_t bytes_per_sec,
uint32_t flags, uint64_t *lower_rate)
770 uint64_t mbits_per_sec, ind_calc, previous_rate = 0;
773 mbits_per_sec = (bytes_per_sec * 8);
775 if ((mbits_per_sec < RS_ONE_MEGABIT_PERSEC) &&
783 if (bytes_per_sec <= rs->rs_rlt[i].
rate) {
792 }
else if ((mbits_per_sec > RS_ONE_GIGABIT_PERSEC) &&
798 if (mbits_per_sec < RS_TEN_GIGABIT_PERSEC)
799 rte = &rs->
rs_rlt[(ALL_HARDWARE_RATES-1)];
801 arte = &rs->
rs_rlt[(ALL_HARDWARE_RATES-1)];
802 previous_rate = rs->
rs_rlt[(ALL_HARDWARE_RATES-2)].
rate;
811 ind_calc = mbits_per_sec/RS_ONE_MEGABIT_PERSEC;
812 if ((ind_calc * RS_ONE_MEGABIT_PERSEC) != mbits_per_sec)
816 if (ind_calc > (ALL_HARDWARE_RATES-1)) {
818 ind_calc = ALL_HARDWARE_RATES-1;
822 rte = &rs->
rs_rlt[ind_calc];
824 previous_rate = rs->
rs_rlt[(ind_calc-1)].
rate;
827 if ((mbits_per_sec < RS_ONE_MEGABIT_PERSEC) &&
835 }
else if ((mbits_per_sec > RS_ONE_GIGABIT_PERSEC) &&
838 if (bytes_per_sec == rs->
rs_rlt[(ALL_HARDWARE_RATES-1)].
rate) {
840 rte = &rs->
rs_rlt[(ALL_HARDWARE_RATES-1)];
844 ind_calc = mbits_per_sec/RS_ONE_MEGABIT_PERSEC;
845 if ((ind_calc * RS_ONE_MEGABIT_PERSEC) == mbits_per_sec) {
848 if (ind_calc > (ALL_HARDWARE_RATES-1)) {
850 ind_calc = ALL_HARDWARE_RATES-1;
853 rte = &rs->
rs_rlt[ind_calc];
858 if ((mbits_per_sec < RS_ONE_MEGABIT_PERSEC) &&
862 if (bytes_per_sec < rs->rs_rlt[i].
rate) {
879 }
else if (mbits_per_sec > RS_ONE_GIGABIT_PERSEC) {
880 if ((bytes_per_sec < rs->rs_rlt[(ALL_HARDWARE_RATES-1)].rate) &&
883 rte = &rs->
rs_rlt[(ALL_HARDWARE_RATES-1)];
885 (bytes_per_sec == rs->
rs_rlt[(ALL_HARDWARE_RATES-1)].
rate) &&
888 rte = &rs->
rs_rlt[(ALL_HARDWARE_RATES-1)];
891 arte = &rs->
rs_rlt[(ALL_HARDWARE_RATES-1)];
893 previous_rate = rs->
rs_rlt[(ALL_HARDWARE_RATES-2)].
rate;
897 ind_calc = mbits_per_sec/RS_ONE_MEGABIT_PERSEC;
898 if ((ind_calc * RS_ONE_MEGABIT_PERSEC) == mbits_per_sec) {
899 if (ind_calc > (ALL_HARDWARE_RATES-1)) {
901 ind_calc = (ALL_HARDWARE_RATES-1);
903 rte = &rs->
rs_rlt[ind_calc];
905 previous_rate = rs->
rs_rlt[(ind_calc-1)].
rate;
909 ind_calc = (mbits_per_sec + (RS_ONE_MEGABIT_PERSEC-1))/RS_ONE_MEGABIT_PERSEC;
911 if (ind_calc > (ALL_HARDWARE_RATES-1)) {
913 ind_calc = ALL_HARDWARE_RATES-1;
916 rte = &rs->
rs_rlt[ind_calc];
918 previous_rate = rs->
rs_rlt[(ind_calc-1)].
rate;
930 *lower_rate = previous_rate;
939tcp_find_suitable_rate(
const volatile struct tcp_rate_set *rs, uint64_t bytes_per_sec,
uint32_t flags, uint64_t *lower_rate)
953 uint64_t previous_rate = 0;
963 return (tcp_int_find_suitable_rate(rs, bytes_per_sec,
flags, lower_rate));
972 for (i = rs->
rs_lowest_valid, matched = 0; i <= rs->rs_highest_valid; i++) {
977 if (lower_rate != NULL)
978 *lower_rate = previous_rate;
981 (bytes_per_sec <= rs->rs_rlt[i].
rate)) {
984 if (lower_rate != NULL)
985 *lower_rate = previous_rate;
992 if ((matched == 0) &&
1027 if (lower_rate != NULL)
1032 if ((matched == 0) &&
1041static struct ifnet *
1042rt_find_real_interface(
struct ifnet *ifp,
struct inpcb *inp,
int *error)
1045 struct m_snd_tag *tag, *ntag;
1046 union if_snd_tag_alloc_params params = {
1047 .rate_limit.hdr.type = IF_SND_TAG_TYPE_RATE_LIMIT,
1050 .rate_limit.max_rate = COMMON_RATE,
1051 .rate_limit.flags = M_NOWAIT,
1056 M_HASHTYPE_RSS_TCP_IPV6 : M_HASHTYPE_RSS_TCP_IPV4);
1058 params.rate_limit.hdr.flowtype = M_HASHTYPE_OPAQUE_HASH;
1060 err = m_snd_tag_alloc(ifp, ¶ms, &tag);
1068 while (ntag->sw->next_snd_tag != NULL) {
1069 ntag = ntag->sw->next_snd_tag(ntag);
1072 m_snd_tag_rele(tag);
1082 atomic_add_long(&decon_rte->
using, 1);
1091 atomic_subtract_long(&decon_rte->
using, 1);
1117find_rs_for_ifp(
struct ifnet *ifp)
1121 CK_LIST_FOREACH(rs, &int_rs,
next) {
1122 if ((rs->
rs_ifp == ifp) &&
1133rt_setup_rate(
struct inpcb *inp,
struct ifnet *ifp, uint64_t bytes_per_sec,
1146 struct epoch_tracker et;
1147 struct ifnet *oifp = ifp;
1150 NET_EPOCH_ENTER(et);
1152 rs = find_rs_for_ifp(ifp);
1183 tifp = rt_find_real_interface(ifp, inp, error);
1190 KASSERT((tifp != ifp),
1191 (
"Lookup failure ifp:%p inp:%p rt_find_real_interface() returns the same interface tifp:%p?\n",
1194 goto use_real_interface;
1203 rte = tcp_find_suitable_rate(rs, bytes_per_sec, flags, lower_rate);
1205 err = in_pcbattach_txrtlmt(inp, oifp,
1217 (
"Setup rate has no snd_tag inp:%p rte:%p rate:%llu rs:%p",
1218 inp, rte, (
unsigned long long)rte->
rate, rs));
1220 counter_u64_add(rate_limit_new, 1);
1236tcp_rl_ifnet_link(
void *arg __unused,
struct ifnet *ifp,
int link_state)
1240 struct epoch_tracker et;
1242 if (((ifp->if_capenable & IFCAP_TXRTLMT) == 0) ||
1243 (link_state != LINK_STATE_UP)) {
1250 NET_EPOCH_ENTER(et);
1252 rs = find_rs_for_ifp(ifp);
1255 mtx_unlock(&rs_mtx);
1259 mtx_unlock(&rs_mtx);
1261 rt_setup_new_rs(ifp, &error);
1265tcp_rl_ifnet_departure(
void *arg __unused,
struct ifnet *ifp)
1268 struct epoch_tracker et;
1271 NET_EPOCH_ENTER(et);
1273 rs = find_rs_for_ifp(ifp);
1275 CK_LIST_REMOVE(rs,
next);
1286 rs_defer_destroy(rs);
1288 mtx_unlock(&rs_mtx);
1293tcp_rl_shutdown(
void *arg __unused,
int howto __unused)
1296 struct epoch_tracker et;
1299 NET_EPOCH_ENTER(et);
1301 CK_LIST_FOREACH_SAFE(rs, &int_rs,
next, nrs) {
1302 CK_LIST_REMOVE(rs,
next);
1313 rs_defer_destroy(rs);
1315 mtx_unlock(&rs_mtx);
1321 uint64_t bytes_per_sec,
int flags,
int *error, uint64_t *lower_rate)
1325 struct ktls_session *tls;
1334 if ((ifp->if_capenable & IFCAP_TXRTLMT) == 0) {
1345 if ((ifp->if_capenable & IFCAP_TXTLS_RTLMT) == 0 ||
1353 rte = rt_setup_rate(tp->
t_inpcb, ifp, bytes_per_sec, flags, error, lower_rate);
1355 rl_increment_using(rte);
1357 if (rte != NULL && tls != NULL && tls->snd_tag != NULL) {
1363 MPASS(tls->snd_tag->sw->type == IF_SND_TAG_TYPE_TLS);
1364 ktls_output_eagain(tp->
t_inpcb, tls);
1384 struct tcpcb *tp,
struct ifnet *ifp,
1385 uint64_t bytes_per_sec,
int flags,
int *error, uint64_t *lower_rate)
1390 struct ktls_session *tls = NULL;
1408 else if (tls->snd_tag != NULL &&
1409 tls->snd_tag->sw->type != IF_SND_TAG_TYPE_TLS_RATE_LIMIT) {
1410 if (!tls->reset_pending) {
1419 *error = EOPNOTSUPP;
1447 bytes_per_sec, flags, error, lower_rate);
1450 nrte = tcp_find_suitable_rate(rs, bytes_per_sec, flags, lower_rate);
1464 rl_decrement_using(crte);
1465 rl_increment_using(nrte);
1469 err = ktls_modify_txrtlmt(tls, nrte->
rate);
1472 err = in_pcbmodify_txrtlmt(tp->
t_inpcb, nrte->
rate);
1477 rl_decrement_using(nrte);
1482 in_pcbdetach_txrtlmt(tp->
t_inpcb);
1485 struct epoch_tracker et;
1487 NET_EPOCH_ENTER(et);
1493 rs_defer_destroy(lrs);
1494 mtx_unlock(&rs_mtx);
1502 counter_u64_add(rate_limit_chg, 1);
1527 rl_decrement_using(crte);
1530 struct epoch_tracker et;
1532 NET_EPOCH_ENTER(et);
1538 rs_defer_destroy(rs);
1539 mtx_unlock(&rs_mtx);
1549 in_pcbdetach_txrtlmt(tp->
t_inpcb);
1552#define ONE_POINT_TWO_MEG 150000
1553#define ONE_HUNDRED_MBPS 12500000
1554#define FIVE_HUNDRED_MBPS 62500000
1555#define MAX_MSS_SENT 43
1566 memset(&log, 0,
sizeof(log));
1567 log.u_bbr.flex1 = segsiz;
1568 log.u_bbr.flex2 = new_tso;
1569 log.u_bbr.flex3 = time_between;
1570 log.u_bbr.flex4 = calc_time_between;
1571 log.u_bbr.flex5 = segs;
1572 log.u_bbr.flex6 = res_div;
1573 log.u_bbr.flex7 = mult;
1574 log.u_bbr.flex8 = mod;
1576 log.u_bbr.cur_del_rate = bw;
1577 log.u_bbr.delRate = hw_rate;
1582 0, &log,
false, &tv);
1601 uint64_t lentim, res, bytes;
1605 if (bytes > (64 * 1000))
1608 new_tso = (bytes + segsiz - 1) / segsiz;
1613 if (rs_floor_mss && (new_tso < rs_floor_mss))
1614 new_tso = rs_floor_mss;
1615 else if (new_tso < min_tso_segs)
1616 new_tso = min_tso_segs;
1617 if (new_tso > MAX_MSS_SENT)
1618 new_tso = MAX_MSS_SENT;
1620 tcp_log_pacing_size(tp, bw, segsiz, new_tso,
1621 0, 0, 0, 0, 0, 0, 1);
1657 if (te->
rate > FIVE_HUNDRED_MBPS)
1659 if (te->
rate == bw) {
1662 tcp_log_pacing_size(tp, bw, segsiz, new_tso,
1664 (segsiz * MAX_MSS_SENT), 0, 0, 3);
1665 return (segsiz * MAX_MSS_SENT);
1672 res_div = ((res * num_of_waits_allowed) + wait_time_floor);
1674 segs = (res_div + delta - 1)/delta;
1675 if (segs < min_tso_segs)
1676 segs = min_tso_segs;
1677 if (segs < rs_hw_floor_mss)
1678 segs = rs_hw_floor_mss;
1679 if (segs > MAX_MSS_SENT)
1680 segs = MAX_MSS_SENT;
1682 tcp_log_pacing_size(tp, bw, segsiz, new_tso,
1684 segs, res_div, 1, 3);
1687 if (segs < new_tso) {
1700 tcp_log_pacing_size(tp, bw, segsiz, new_tso,
1712 struct epoch_tracker et;
1716 NET_EPOCH_ENTER(et);
1718 rs = find_rs_for_ifp(ifp);
1726 tifp = rt_find_real_interface(ifp, inp, NULL);
1732 goto use_next_interface;
1741static eventhandler_tag rl_ifnet_departs;
1742static eventhandler_tag rl_ifnet_arrives;
1743static eventhandler_tag rl_shutdown_start;
1746tcp_rs_init(
void *st __unused)
1748 CK_LIST_INIT(&int_rs);
1749 rs_number_alive = 0;
1751 mtx_init(&rs_mtx,
"tcp_rs_mtx",
"rsmtx", MTX_DEF);
1752 rl_ifnet_departs = EVENTHANDLER_REGISTER(ifnet_departure_event,
1753 tcp_rl_ifnet_departure,
1754 NULL, EVENTHANDLER_PRI_ANY);
1755 rl_ifnet_arrives = EVENTHANDLER_REGISTER(ifnet_link_event,
1757 NULL, EVENTHANDLER_PRI_ANY);
1758 rl_shutdown_start = EVENTHANDLER_REGISTER(shutdown_pre_sync,
1759 tcp_rl_shutdown, NULL,
1760 SHUTDOWN_PRI_FIRST);
1761 printf(
"TCP_ratelimit: Is now initialized\n");
1764SYSINIT(tcp_rl_init, SI_SUB_SMP + 1, SI_ORDER_ANY, tcp_rs_init, NULL);
static SYSCTL_NODE(_net_inet_accf, OID_AUTO, http, CTLFLAG_RW|CTLFLAG_MPSAFE, 0, "HTTP accept filter")
SYSCTL_UINT(_net_inet_tcp_cc_hystartplusplus, OID_AUTO, minrtt_thresh, CTLFLAG_RW, &hystart_minrtt_thresh, 4000, "HyStarts++ minimum RTT thresh used in clamp (in microseconds)")
SYSINIT(cc, SI_SUB_PROTO_IFATTACHDOMAIN, SI_ORDER_FIRST, cc_init, NULL)
#define INP_WLOCK_ASSERT(inp)
#define ONE_POINT_TWO_MEG
struct socket * inp_socket
struct m_snd_tag * inp_snd_tag
const struct tcp_rate_set * ptbl
struct epoch_context rs_epoch_ctx
struct tcp_hwrate_limit_table * rs_rlt
struct sysctl_ctx_list sysctl_ctx
#define TCP_TLS_MODE_IFNET
static __inline uint32_t tcp_get_usecs(struct timeval *tv)
#define TCP_LOG_EVENTP(tp, th, rxbuf, txbuf, eventid, errornum, len, stackinfo, th_hostorder, tv)
MALLOC_DEFINE(M_TCPPACE, "tcp_hwpace", "TCP Hardware pacing memory")
#define HDWRPACE_IFPDEPARTED
#define HDWRPACE_TAGPRESENT
void tcp_rl_log_enobuf(const struct tcp_hwrate_limit_table *rte)
uint32_t tcp_get_pacing_burst_size(struct tcpcb *tp, uint64_t bw, uint32_t segsiz, int can_use_1mss, const struct tcp_hwrate_limit_table *te, int *err)
static const struct tcp_hwrate_limit_table * tcp_chg_pacing_rate(const struct tcp_hwrate_limit_table *crte, struct tcpcb *tp, struct ifnet *ifp, uint64_t bytes_per_sec, int flags, int *error, uint64_t *lower_rate)
static const struct tcp_hwrate_limit_table * tcp_set_pacing_rate(struct tcpcb *tp, struct ifnet *ifp, uint64_t bytes_per_sec, int flags, int *error, uint64_t *lower_rate)
static uint64_t tcp_hw_highest_rate_ifp(struct ifnet *ifp, struct inpcb *inp)
static void tcp_rel_pacing_rate(const struct tcp_hwrate_limit_table *crte, struct tcpcb *tp)
#define RS_PACING_EXACT_MATCH
#define ETHERNET_SEGMENT_SIZE