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diff --git a/sys/conf/files b/sys/conf/files
--- a/sys/conf/files
+++ b/sys/conf/files
@@ -4354,6 +4354,7 @@
netinet/tcp_input.c optional inet | inet6
netinet/tcp_log_buf.c optional tcp_blackbox inet | tcp_blackbox inet6
netinet/tcp_lro.c optional inet | inet6
+netinet/tcp_lro_hpts.c optional tcphpts inet | tcphpts inet6
netinet/tcp_output.c optional inet | inet6
netinet/tcp_offload.c optional tcp_offload inet | tcp_offload inet6
netinet/tcp_hpts.c optional tcphpts inet | tcphpts inet6
diff --git a/sys/modules/tcp/hpts/Makefile b/sys/modules/tcp/hpts/Makefile
--- a/sys/modules/tcp/hpts/Makefile
+++ b/sys/modules/tcp/hpts/Makefile
@@ -1,6 +1,7 @@
.PATH: ${SRCTOP}/sys/netinet
KMOD= tcphpts
-SRCS= tcp_hpts.c opt_inet.h opt_inet6.h opt_rss.h device_if.h bus_if.h
+SRCS= tcp_hpts.c tcp_lro_hpts.c \
+ opt_inet.h opt_inet6.h opt_rss.h device_if.h bus_if.h
.include <bsd.kmod.mk>
diff --git a/sys/netinet/tcp_lro.h b/sys/netinet/tcp_lro.h
--- a/sys/netinet/tcp_lro.h
+++ b/sys/netinet/tcp_lro.h
@@ -33,7 +33,7 @@
#include <sys/time.h>
#include <sys/param.h>
-
+#include <sys/mbuf.h>
#include <netinet/in.h>
#ifndef TCP_LRO_ENTRIES
@@ -200,12 +200,25 @@
#define TCP_LRO_LENGTH_MAX (65535 - 255) /* safe value with room for outer headers */
#define TCP_LRO_ACKCNT_MAX 65535 /* unlimited */
+#define TCP_LRO_TS_OPTION ntohl((TCPOPT_NOP << 24) | (TCPOPT_NOP << 16) |\
+ (TCPOPT_TIMESTAMP << 8) | TCPOLEN_TIMESTAMP)
+
+static inline struct tcphdr *
+tcp_lro_get_th(struct mbuf *m)
+{
+ return ((struct tcphdr *)((char *)m->m_data +
+ m->m_pkthdr.lro_tcp_h_off));
+}
+
+extern long tcplro_stacks_wanting_mbufq;
+
int tcp_lro_init(struct lro_ctrl *);
int tcp_lro_init_args(struct lro_ctrl *, struct ifnet *, unsigned, unsigned);
void tcp_lro_free(struct lro_ctrl *);
void tcp_lro_flush_inactive(struct lro_ctrl *, const struct timeval *);
void tcp_lro_flush(struct lro_ctrl *, struct lro_entry *);
void tcp_lro_flush_all(struct lro_ctrl *);
+int tcp_lro_flush_tcphpts(struct lro_ctrl *, struct lro_entry *);
int tcp_lro_rx(struct lro_ctrl *, struct mbuf *, uint32_t);
void tcp_lro_queue_mbuf(struct lro_ctrl *, struct mbuf *);
void tcp_lro_reg_mbufq(void);
diff --git a/sys/netinet/tcp_lro.c b/sys/netinet/tcp_lro.c
--- a/sys/netinet/tcp_lro.c
+++ b/sys/netinet/tcp_lro.c
@@ -80,25 +80,14 @@
static MALLOC_DEFINE(M_LRO, "LRO", "LRO control structures");
-#define TCP_LRO_TS_OPTION \
- ntohl((TCPOPT_NOP << 24) | (TCPOPT_NOP << 16) | \
- (TCPOPT_TIMESTAMP << 8) | TCPOLEN_TIMESTAMP)
-
static void tcp_lro_rx_done(struct lro_ctrl *lc);
static int tcp_lro_rx_common(struct lro_ctrl *lc, struct mbuf *m,
uint32_t csum, bool use_hash);
-#ifdef TCPHPTS
-static bool do_bpf_strip_and_compress(struct tcpcb *, struct lro_ctrl *,
- struct lro_entry *, struct mbuf **, struct mbuf **, struct mbuf **,
- bool *, bool, bool, struct ifnet *, bool);
-
-#endif
-
SYSCTL_NODE(_net_inet_tcp, OID_AUTO, lro, CTLFLAG_RW | CTLFLAG_MPSAFE, 0,
"TCP LRO");
-static long tcplro_stacks_wanting_mbufq;
+long tcplro_stacks_wanting_mbufq;
counter_u64_t tcp_inp_lro_direct_queue;
counter_u64_t tcp_inp_lro_wokeup_queue;
counter_u64_t tcp_inp_lro_compressed;
@@ -487,12 +476,6 @@
return (TCP_LRO_CANNOT);
}
-static struct tcphdr *
-tcp_lro_get_th(struct mbuf *m)
-{
- return ((struct tcphdr *)((uint8_t *)m->m_data + m->m_pkthdr.lro_tcp_h_off));
-}
-
static void
lro_free_mbuf_chain(struct mbuf *m)
{
@@ -680,58 +663,6 @@
}
#endif
-#ifdef TCPHPTS
-static void
-tcp_lro_log(struct tcpcb *tp, const struct lro_ctrl *lc,
- const struct lro_entry *le, const struct mbuf *m,
- int frm, int32_t tcp_data_len, uint32_t th_seq,
- uint32_t th_ack, uint16_t th_win)
-{
- if (tcp_bblogging_on(tp)) {
- union tcp_log_stackspecific log;
- struct timeval tv, btv;
- uint32_t cts;
-
- cts = tcp_get_usecs(&tv);
- memset(&log, 0, sizeof(union tcp_log_stackspecific));
- log.u_bbr.flex8 = frm;
- log.u_bbr.flex1 = tcp_data_len;
- if (m)
- log.u_bbr.flex2 = m->m_pkthdr.len;
- else
- log.u_bbr.flex2 = 0;
- if (le->m_head) {
- log.u_bbr.flex3 = le->m_head->m_pkthdr.lro_nsegs;
- log.u_bbr.flex4 = le->m_head->m_pkthdr.lro_tcp_d_len;
- log.u_bbr.flex5 = le->m_head->m_pkthdr.len;
- log.u_bbr.delRate = le->m_head->m_flags;
- log.u_bbr.rttProp = le->m_head->m_pkthdr.rcv_tstmp;
- }
- log.u_bbr.inflight = th_seq;
- log.u_bbr.delivered = th_ack;
- log.u_bbr.timeStamp = cts;
- log.u_bbr.epoch = le->next_seq;
- log.u_bbr.lt_epoch = le->ack_seq;
- log.u_bbr.pacing_gain = th_win;
- log.u_bbr.cwnd_gain = le->window;
- log.u_bbr.lost = curcpu;
- log.u_bbr.cur_del_rate = (uintptr_t)m;
- log.u_bbr.bw_inuse = (uintptr_t)le->m_head;
- bintime2timeval(&lc->lro_last_queue_time, &btv);
- log.u_bbr.flex6 = tcp_tv_to_usectick(&btv);
- log.u_bbr.flex7 = le->compressed;
- log.u_bbr.pacing_gain = le->uncompressed;
- if (in_epoch(net_epoch_preempt))
- log.u_bbr.inhpts = 1;
- else
- log.u_bbr.inhpts = 0;
- TCP_LOG_EVENTP(tp, NULL, &tptosocket(tp)->so_rcv,
- &tptosocket(tp)->so_snd,
- TCP_LOG_LRO, 0, 0, &log, false, &tv);
- }
-}
-#endif
-
static inline void
tcp_lro_assign_and_checksum_16(uint16_t *ptr, uint16_t value, uint16_t *psum)
{
@@ -1175,276 +1106,6 @@
}
}
-#ifdef TCPHPTS
-static void
-tcp_queue_pkts(struct tcpcb *tp, struct lro_entry *le)
-{
-
- INP_WLOCK_ASSERT(tptoinpcb(tp));
-
- STAILQ_HEAD(, mbuf) q = { le->m_head,
- &STAILQ_NEXT(le->m_last_mbuf, m_stailqpkt) };
- STAILQ_CONCAT(&tp->t_inqueue, &q);
- le->m_head = NULL;
- le->m_last_mbuf = NULL;
-}
-
-static bool
-tcp_lro_check_wake_status(struct tcpcb *tp)
-{
-
- if (tp->t_fb->tfb_early_wake_check != NULL)
- return ((tp->t_fb->tfb_early_wake_check)(tp));
- return (false);
-}
-
-static struct mbuf *
-tcp_lro_get_last_if_ackcmp(struct lro_ctrl *lc, struct lro_entry *le,
- struct tcpcb *tp, int32_t *new_m, bool can_append_old_cmp)
-{
- struct mbuf *m;
-
- /* Look at the last mbuf if any in queue */
- if (can_append_old_cmp) {
- m = STAILQ_LAST(&tp->t_inqueue, mbuf, m_stailqpkt);
- if (m != NULL && (m->m_flags & M_ACKCMP) != 0) {
- if (M_TRAILINGSPACE(m) >= sizeof(struct tcp_ackent)) {
- tcp_lro_log(tp, lc, le, NULL, 23, 0, 0, 0, 0);
- *new_m = 0;
- counter_u64_add(tcp_extra_mbuf, 1);
- return (m);
- } else {
- /* Mark we ran out of space */
- tp->t_flags2 |= TF2_MBUF_L_ACKS;
- }
- }
- }
- /* Decide mbuf size. */
- tcp_lro_log(tp, lc, le, NULL, 21, 0, 0, 0, 0);
- if (tp->t_flags2 & TF2_MBUF_L_ACKS)
- m = m_getcl(M_NOWAIT, MT_DATA, M_ACKCMP | M_PKTHDR);
- else
- m = m_gethdr(M_NOWAIT, MT_DATA);
-
- if (__predict_false(m == NULL)) {
- counter_u64_add(tcp_would_have_but, 1);
- return (NULL);
- }
- counter_u64_add(tcp_comp_total, 1);
- m->m_pkthdr.rcvif = lc->ifp;
- m->m_flags |= M_ACKCMP;
- *new_m = 1;
- return (m);
-}
-
-static struct tcpcb *
-tcp_lro_lookup(struct ifnet *ifp, struct lro_parser *pa)
-{
- struct inpcb *inp;
-
- switch (pa->data.lro_type) {
-#ifdef INET6
- case LRO_TYPE_IPV6_TCP:
- inp = in6_pcblookup(&V_tcbinfo,
- &pa->data.s_addr.v6,
- pa->data.s_port,
- &pa->data.d_addr.v6,
- pa->data.d_port,
- INPLOOKUP_WLOCKPCB,
- ifp);
- break;
-#endif
-#ifdef INET
- case LRO_TYPE_IPV4_TCP:
- inp = in_pcblookup(&V_tcbinfo,
- pa->data.s_addr.v4,
- pa->data.s_port,
- pa->data.d_addr.v4,
- pa->data.d_port,
- INPLOOKUP_WLOCKPCB,
- ifp);
- break;
-#endif
- default:
- return (NULL);
- }
-
- return (intotcpcb(inp));
-}
-
-static inline bool
-tcp_lro_ack_valid(struct mbuf *m, struct tcphdr *th, uint32_t **ppts, bool *other_opts)
-{
- /*
- * This function returns two bits of valuable information.
- * a) Is what is present capable of being ack-compressed,
- * we can ack-compress if there is no options or just
- * a timestamp option, and of course the th_flags must
- * be correct as well.
- * b) Our other options present such as SACK. This is
- * used to determine if we want to wakeup or not.
- */
- bool ret = true;
-
- switch (th->th_off << 2) {
- case (sizeof(*th) + TCPOLEN_TSTAMP_APPA):
- *ppts = (uint32_t *)(th + 1);
- /* Check if we have only one timestamp option. */
- if (**ppts == TCP_LRO_TS_OPTION)
- *other_opts = false;
- else {
- *other_opts = true;
- ret = false;
- }
- break;
- case (sizeof(*th)):
- /* No options. */
- *ppts = NULL;
- *other_opts = false;
- break;
- default:
- *ppts = NULL;
- *other_opts = true;
- ret = false;
- break;
- }
- /* For ACKCMP we only accept ACK, PUSH, ECE and CWR. */
- if ((tcp_get_flags(th) & ~(TH_ACK | TH_PUSH | TH_ECE | TH_CWR)) != 0)
- ret = false;
- /* If it has data on it we cannot compress it */
- if (m->m_pkthdr.lro_tcp_d_len)
- ret = false;
-
- /* ACK flag must be set. */
- if (!(tcp_get_flags(th) & TH_ACK))
- ret = false;
- return (ret);
-}
-
-static int
-tcp_lro_flush_tcphpts(struct lro_ctrl *lc, struct lro_entry *le)
-{
- struct tcpcb *tp;
- struct mbuf **pp, *cmp, *mv_to;
- struct ifnet *lagg_ifp;
- bool bpf_req, lagg_bpf_req, should_wake, can_append_old_cmp;
-
- /* Check if packet doesn't belongs to our network interface. */
- if ((tcplro_stacks_wanting_mbufq == 0) ||
- (le->outer.data.vlan_id != 0) ||
- (le->inner.data.lro_type != LRO_TYPE_NONE))
- return (TCP_LRO_CANNOT);
-
-#ifdef INET6
- /*
- * Be proactive about unspecified IPv6 address in source. As
- * we use all-zero to indicate unbounded/unconnected pcb,
- * unspecified IPv6 address can be used to confuse us.
- *
- * Note that packets with unspecified IPv6 destination is
- * already dropped in ip6_input.
- */
- if (__predict_false(le->outer.data.lro_type == LRO_TYPE_IPV6_TCP &&
- IN6_IS_ADDR_UNSPECIFIED(&le->outer.data.s_addr.v6)))
- return (TCP_LRO_CANNOT);
-
- if (__predict_false(le->inner.data.lro_type == LRO_TYPE_IPV6_TCP &&
- IN6_IS_ADDR_UNSPECIFIED(&le->inner.data.s_addr.v6)))
- return (TCP_LRO_CANNOT);
-#endif
- /* Lookup inp, if any. Returns locked TCP inpcb. */
- tp = tcp_lro_lookup(lc->ifp,
- (le->inner.data.lro_type == LRO_TYPE_NONE) ? &le->outer : &le->inner);
- if (tp == NULL)
- return (TCP_LRO_CANNOT);
-
- counter_u64_add(tcp_inp_lro_locks_taken, 1);
-
- /* Check if the inp is dead, Jim. */
- if (tp->t_state == TCPS_TIME_WAIT) {
- INP_WUNLOCK(tptoinpcb(tp));
- return (TCP_LRO_CANNOT);
- }
- if (tp->t_lro_cpu == HPTS_CPU_NONE && lc->lro_cpu_is_set == 1)
- tp->t_lro_cpu = lc->lro_last_cpu;
- /* Check if the transport doesn't support the needed optimizations. */
- if ((tp->t_flags2 & (TF2_SUPPORTS_MBUFQ | TF2_MBUF_ACKCMP)) == 0) {
- INP_WUNLOCK(tptoinpcb(tp));
- return (TCP_LRO_CANNOT);
- }
-
- if (tp->t_flags2 & TF2_MBUF_QUEUE_READY)
- should_wake = false;
- else
- should_wake = true;
- /* Check if packets should be tapped to BPF. */
- bpf_req = bpf_peers_present(lc->ifp->if_bpf);
- lagg_bpf_req = false;
- lagg_ifp = NULL;
- if (lc->ifp->if_type == IFT_IEEE8023ADLAG ||
- lc->ifp->if_type == IFT_INFINIBANDLAG) {
- struct lagg_port *lp = lc->ifp->if_lagg;
- struct lagg_softc *sc = lp->lp_softc;
-
- lagg_ifp = sc->sc_ifp;
- if (lagg_ifp != NULL)
- lagg_bpf_req = bpf_peers_present(lagg_ifp->if_bpf);
- }
-
- /* Strip and compress all the incoming packets. */
- can_append_old_cmp = true;
- cmp = NULL;
- for (pp = &le->m_head; *pp != NULL; ) {
- mv_to = NULL;
- if (do_bpf_strip_and_compress(tp, lc, le, pp,
- &cmp, &mv_to, &should_wake, bpf_req,
- lagg_bpf_req, lagg_ifp, can_append_old_cmp) == false) {
- /* Advance to next mbuf. */
- pp = &(*pp)->m_nextpkt;
- /*
- * Once we have appended we can't look in the pending
- * inbound packets for a compressed ack to append to.
- */
- can_append_old_cmp = false;
- /*
- * Once we append we also need to stop adding to any
- * compressed ack we were remembering. A new cmp
- * ack will be required.
- */
- cmp = NULL;
- tcp_lro_log(tp, lc, le, NULL, 25, 0, 0, 0, 0);
- } else if (mv_to != NULL) {
- /* We are asked to move pp up */
- pp = &mv_to->m_nextpkt;
- tcp_lro_log(tp, lc, le, NULL, 24, 0, 0, 0, 0);
- } else
- tcp_lro_log(tp, lc, le, NULL, 26, 0, 0, 0, 0);
- }
- /* Update "m_last_mbuf", if any. */
- if (pp == &le->m_head)
- le->m_last_mbuf = *pp;
- else
- le->m_last_mbuf = __containerof(pp, struct mbuf, m_nextpkt);
-
- /* Check if any data mbufs left. */
- if (le->m_head != NULL) {
- counter_u64_add(tcp_inp_lro_direct_queue, 1);
- tcp_lro_log(tp, lc, le, NULL, 22, 1, tp->t_flags2, 0, 1);
- tcp_queue_pkts(tp, le);
- }
- if (should_wake) {
- /* Wakeup */
- counter_u64_add(tcp_inp_lro_wokeup_queue, 1);
- if ((*tp->t_fb->tfb_do_queued_segments)(tp, 0))
- /* TCP cb gone and unlocked. */
- return (0);
- }
- INP_WUNLOCK(tptoinpcb(tp));
-
- return (0); /* Success. */
-}
-#endif
-
void
tcp_lro_flush(struct lro_ctrl *lc, struct lro_entry *le)
{
@@ -1614,205 +1275,6 @@
lc->lro_mbuf_count = 0;
}
-#ifdef TCPHPTS
-static void
-build_ack_entry(struct tcp_ackent *ae, struct tcphdr *th, struct mbuf *m,
- uint32_t *ts_ptr, uint16_t iptos)
-{
- /*
- * Given a TCP ACK, summarize it down into the small TCP ACK
- * entry.
- */
- ae->timestamp = m->m_pkthdr.rcv_tstmp;
- ae->flags = 0;
- if (m->m_flags & M_TSTMP_LRO)
- ae->flags |= TSTMP_LRO;
- else if (m->m_flags & M_TSTMP)
- ae->flags |= TSTMP_HDWR;
- ae->seq = ntohl(th->th_seq);
- ae->ack = ntohl(th->th_ack);
- ae->flags |= tcp_get_flags(th);
- if (ts_ptr != NULL) {
- ae->ts_value = ntohl(ts_ptr[1]);
- ae->ts_echo = ntohl(ts_ptr[2]);
- ae->flags |= HAS_TSTMP;
- }
- ae->win = ntohs(th->th_win);
- ae->codepoint = iptos;
-}
-
-/*
- * Do BPF tap for either ACK_CMP packets or MBUF QUEUE type packets
- * and strip all, but the IPv4/IPv6 header.
- */
-static bool
-do_bpf_strip_and_compress(struct tcpcb *tp, struct lro_ctrl *lc,
- struct lro_entry *le, struct mbuf **pp, struct mbuf **cmp, struct mbuf **mv_to,
- bool *should_wake, bool bpf_req, bool lagg_bpf_req, struct ifnet *lagg_ifp, bool can_append_old_cmp)
-{
- union {
- void *ptr;
- struct ip *ip4;
- struct ip6_hdr *ip6;
- } l3;
- struct mbuf *m;
- struct mbuf *nm;
- struct tcphdr *th;
- struct tcp_ackent *ack_ent;
- uint32_t *ts_ptr;
- int32_t n_mbuf;
- bool other_opts, can_compress;
- uint8_t lro_type;
- uint16_t iptos;
- int tcp_hdr_offset;
- int idx;
-
- /* Get current mbuf. */
- m = *pp;
-
- /* Let the BPF see the packet */
- if (__predict_false(bpf_req))
- ETHER_BPF_MTAP(lc->ifp, m);
-
- if (__predict_false(lagg_bpf_req))
- ETHER_BPF_MTAP(lagg_ifp, m);
-
- tcp_hdr_offset = m->m_pkthdr.lro_tcp_h_off;
- lro_type = le->inner.data.lro_type;
- switch (lro_type) {
- case LRO_TYPE_NONE:
- lro_type = le->outer.data.lro_type;
- switch (lro_type) {
- case LRO_TYPE_IPV4_TCP:
- tcp_hdr_offset -= sizeof(*le->outer.ip4);
- m->m_pkthdr.lro_etype = ETHERTYPE_IP;
- break;
- case LRO_TYPE_IPV6_TCP:
- tcp_hdr_offset -= sizeof(*le->outer.ip6);
- m->m_pkthdr.lro_etype = ETHERTYPE_IPV6;
- break;
- default:
- goto compressed;
- }
- break;
- case LRO_TYPE_IPV4_TCP:
- tcp_hdr_offset -= sizeof(*le->outer.ip4);
- m->m_pkthdr.lro_etype = ETHERTYPE_IP;
- break;
- case LRO_TYPE_IPV6_TCP:
- tcp_hdr_offset -= sizeof(*le->outer.ip6);
- m->m_pkthdr.lro_etype = ETHERTYPE_IPV6;
- break;
- default:
- goto compressed;
- }
-
- MPASS(tcp_hdr_offset >= 0);
-
- m_adj(m, tcp_hdr_offset);
- m->m_flags |= M_LRO_EHDRSTRP;
- m->m_flags &= ~M_ACKCMP;
- m->m_pkthdr.lro_tcp_h_off -= tcp_hdr_offset;
-
- th = tcp_lro_get_th(m);
-
- th->th_sum = 0; /* TCP checksum is valid. */
-
- /* Check if ACK can be compressed */
- can_compress = tcp_lro_ack_valid(m, th, &ts_ptr, &other_opts);
-
- /* Now lets look at the should wake states */
- if ((other_opts == true) &&
- ((tp->t_flags2 & TF2_DONT_SACK_QUEUE) == 0)) {
- /*
- * If there are other options (SACK?) and the
- * tcp endpoint has not expressly told us it does
- * not care about SACKS, then we should wake up.
- */
- *should_wake = true;
- } else if (*should_wake == false) {
- /* Wakeup override check if we are false here */
- *should_wake = tcp_lro_check_wake_status(tp);
- }
- /* Is the ack compressable? */
- if (can_compress == false)
- goto done;
- /* Does the TCP endpoint support ACK compression? */
- if ((tp->t_flags2 & TF2_MBUF_ACKCMP) == 0)
- goto done;
-
- /* Lets get the TOS/traffic class field */
- l3.ptr = mtod(m, void *);
- switch (lro_type) {
- case LRO_TYPE_IPV4_TCP:
- iptos = l3.ip4->ip_tos;
- break;
- case LRO_TYPE_IPV6_TCP:
- iptos = IPV6_TRAFFIC_CLASS(l3.ip6);
- break;
- default:
- iptos = 0; /* Keep compiler happy. */
- break;
- }
- /* Now lets get space if we don't have some already */
- if (*cmp == NULL) {
-new_one:
- nm = tcp_lro_get_last_if_ackcmp(lc, le, tp, &n_mbuf,
- can_append_old_cmp);
- if (__predict_false(nm == NULL))
- goto done;
- *cmp = nm;
- if (n_mbuf) {
- /*
- * Link in the new cmp ack to our in-order place,
- * first set our cmp ack's next to where we are.
- */
- nm->m_nextpkt = m;
- (*pp) = nm;
- /*
- * Set it up so mv_to is advanced to our
- * compressed ack. This way the caller can
- * advance pp to the right place.
- */
- *mv_to = nm;
- /*
- * Advance it here locally as well.
- */
- pp = &nm->m_nextpkt;
- }
- } else {
- /* We have one already we are working on */
- nm = *cmp;
- if (M_TRAILINGSPACE(nm) < sizeof(struct tcp_ackent)) {
- /* We ran out of space */
- tp->t_flags2 |= TF2_MBUF_L_ACKS;
- goto new_one;
- }
- }
- MPASS(M_TRAILINGSPACE(nm) >= sizeof(struct tcp_ackent));
- counter_u64_add(tcp_inp_lro_compressed, 1);
- le->compressed++;
- /* We can add in to the one on the tail */
- ack_ent = mtod(nm, struct tcp_ackent *);
- idx = (nm->m_len / sizeof(struct tcp_ackent));
- build_ack_entry(&ack_ent[idx], th, m, ts_ptr, iptos);
-
- /* Bump the size of both pkt-hdr and len */
- nm->m_len += sizeof(struct tcp_ackent);
- nm->m_pkthdr.len += sizeof(struct tcp_ackent);
-compressed:
- /* Advance to next mbuf before freeing. */
- *pp = m->m_nextpkt;
- m->m_nextpkt = NULL;
- m_freem(m);
- return (true);
-done:
- counter_u64_add(tcp_uncomp_total, 1);
- le->uncompressed++;
- return (false);
-}
-#endif
-
static struct lro_head *
tcp_lro_rx_get_bucket(struct lro_ctrl *lc, struct mbuf *m, struct lro_parser *parser)
{
diff --git a/sys/netinet/tcp_lro_hpts.c b/sys/netinet/tcp_lro_hpts.c
new file mode 100644
--- /dev/null
+++ b/sys/netinet/tcp_lro_hpts.c
@@ -0,0 +1,576 @@
+/*-
+ * Copyright (c) 2016-2018 Netflix, Inc.
+ *
+ * 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 REGENTS 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 REGENTS 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>
+#include "opt_inet.h"
+#include "opt_inet6.h"
+
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/kernel.h>
+#include <sys/malloc.h>
+#include <sys/mbuf.h>
+#include <sys/socket.h>
+#include <sys/socketvar.h>
+#include <sys/sysctl.h>
+
+#include <net/if.h>
+#include <net/if_var.h>
+#include <net/ethernet.h>
+#include <net/bpf.h>
+#include <net/vnet.h>
+#include <net/if_dl.h>
+#include <net/if_media.h>
+#include <net/if_types.h>
+#include <net/infiniband.h>
+#include <net/if_lagg.h>
+
+#include <netinet/in.h>
+#include <netinet/ip6.h>
+#include <netinet/ip.h>
+#include <netinet/ip_var.h>
+#include <netinet/in_pcb.h>
+#include <netinet6/in6_pcb.h>
+#include <netinet/tcp.h>
+#include <netinet/tcp_lro.h>
+#include <netinet/tcp_var.h>
+#include <netinet/tcp_hpts.h>
+#include <netinet/tcp_log_buf.h>
+
+static void
+build_ack_entry(struct tcp_ackent *ae, struct tcphdr *th, struct mbuf *m,
+ uint32_t *ts_ptr, uint16_t iptos)
+{
+ /*
+ * Given a TCP ACK, summarize it down into the small TCP ACK
+ * entry.
+ */
+ ae->timestamp = m->m_pkthdr.rcv_tstmp;
+ ae->flags = 0;
+ if (m->m_flags & M_TSTMP_LRO)
+ ae->flags |= TSTMP_LRO;
+ else if (m->m_flags & M_TSTMP)
+ ae->flags |= TSTMP_HDWR;
+ ae->seq = ntohl(th->th_seq);
+ ae->ack = ntohl(th->th_ack);
+ ae->flags |= tcp_get_flags(th);
+ if (ts_ptr != NULL) {
+ ae->ts_value = ntohl(ts_ptr[1]);
+ ae->ts_echo = ntohl(ts_ptr[2]);
+ ae->flags |= HAS_TSTMP;
+ }
+ ae->win = ntohs(th->th_win);
+ ae->codepoint = iptos;
+}
+
+static inline bool
+tcp_lro_ack_valid(struct mbuf *m, struct tcphdr *th, uint32_t **ppts, bool *other_opts)
+{
+ /*
+ * This function returns two bits of valuable information.
+ * a) Is what is present capable of being ack-compressed,
+ * we can ack-compress if there is no options or just
+ * a timestamp option, and of course the th_flags must
+ * be correct as well.
+ * b) Our other options present such as SACK. This is
+ * used to determine if we want to wakeup or not.
+ */
+ bool ret = true;
+
+ switch (th->th_off << 2) {
+ case (sizeof(*th) + TCPOLEN_TSTAMP_APPA):
+ *ppts = (uint32_t *)(th + 1);
+ /* Check if we have only one timestamp option. */
+ if (**ppts == TCP_LRO_TS_OPTION)
+ *other_opts = false;
+ else {
+ *other_opts = true;
+ ret = false;
+ }
+ break;
+ case (sizeof(*th)):
+ /* No options. */
+ *ppts = NULL;
+ *other_opts = false;
+ break;
+ default:
+ *ppts = NULL;
+ *other_opts = true;
+ ret = false;
+ break;
+ }
+ /* For ACKCMP we only accept ACK, PUSH, ECE and CWR. */
+ if ((tcp_get_flags(th) & ~(TH_ACK | TH_PUSH | TH_ECE | TH_CWR)) != 0)
+ ret = false;
+ /* If it has data on it we cannot compress it */
+ if (m->m_pkthdr.lro_tcp_d_len)
+ ret = false;
+
+ /* ACK flag must be set. */
+ if (!(tcp_get_flags(th) & TH_ACK))
+ ret = false;
+ return (ret);
+}
+
+static bool
+tcp_lro_check_wake_status(struct tcpcb *tp)
+{
+
+ if (tp->t_fb->tfb_early_wake_check != NULL)
+ return ((tp->t_fb->tfb_early_wake_check)(tp));
+ return (false);
+}
+
+static void
+tcp_lro_log(struct tcpcb *tp, const struct lro_ctrl *lc,
+ const struct lro_entry *le, const struct mbuf *m,
+ int frm, int32_t tcp_data_len, uint32_t th_seq,
+ uint32_t th_ack, uint16_t th_win)
+{
+ if (tcp_bblogging_on(tp)) {
+ union tcp_log_stackspecific log;
+ struct timeval tv, btv;
+ uint32_t cts;
+
+ cts = tcp_get_usecs(&tv);
+ memset(&log, 0, sizeof(union tcp_log_stackspecific));
+ log.u_bbr.flex8 = frm;
+ log.u_bbr.flex1 = tcp_data_len;
+ if (m)
+ log.u_bbr.flex2 = m->m_pkthdr.len;
+ else
+ log.u_bbr.flex2 = 0;
+ if (le->m_head) {
+ log.u_bbr.flex3 = le->m_head->m_pkthdr.lro_nsegs;
+ log.u_bbr.flex4 = le->m_head->m_pkthdr.lro_tcp_d_len;
+ log.u_bbr.flex5 = le->m_head->m_pkthdr.len;
+ log.u_bbr.delRate = le->m_head->m_flags;
+ log.u_bbr.rttProp = le->m_head->m_pkthdr.rcv_tstmp;
+ }
+ log.u_bbr.inflight = th_seq;
+ log.u_bbr.delivered = th_ack;
+ log.u_bbr.timeStamp = cts;
+ log.u_bbr.epoch = le->next_seq;
+ log.u_bbr.lt_epoch = le->ack_seq;
+ log.u_bbr.pacing_gain = th_win;
+ log.u_bbr.cwnd_gain = le->window;
+ log.u_bbr.lost = curcpu;
+ log.u_bbr.cur_del_rate = (uintptr_t)m;
+ log.u_bbr.bw_inuse = (uintptr_t)le->m_head;
+ bintime2timeval(&lc->lro_last_queue_time, &btv);
+ log.u_bbr.flex6 = tcp_tv_to_usectick(&btv);
+ log.u_bbr.flex7 = le->compressed;
+ log.u_bbr.pacing_gain = le->uncompressed;
+ if (in_epoch(net_epoch_preempt))
+ log.u_bbr.inhpts = 1;
+ else
+ log.u_bbr.inhpts = 0;
+ TCP_LOG_EVENTP(tp, NULL, &tptosocket(tp)->so_rcv,
+ &tptosocket(tp)->so_snd,
+ TCP_LOG_LRO, 0, 0, &log, false, &tv);
+ }
+}
+
+static struct mbuf *
+tcp_lro_get_last_if_ackcmp(struct lro_ctrl *lc, struct lro_entry *le,
+ struct tcpcb *tp, int32_t *new_m, bool can_append_old_cmp)
+{
+ struct mbuf *m;
+
+ /* Look at the last mbuf if any in queue */
+ if (can_append_old_cmp) {
+ m = STAILQ_LAST(&tp->t_inqueue, mbuf, m_stailqpkt);
+ if (m != NULL && (m->m_flags & M_ACKCMP) != 0) {
+ if (M_TRAILINGSPACE(m) >= sizeof(struct tcp_ackent)) {
+ tcp_lro_log(tp, lc, le, NULL, 23, 0, 0, 0, 0);
+ *new_m = 0;
+ counter_u64_add(tcp_extra_mbuf, 1);
+ return (m);
+ } else {
+ /* Mark we ran out of space */
+ tp->t_flags2 |= TF2_MBUF_L_ACKS;
+ }
+ }
+ }
+ /* Decide mbuf size. */
+ tcp_lro_log(tp, lc, le, NULL, 21, 0, 0, 0, 0);
+ if (tp->t_flags2 & TF2_MBUF_L_ACKS)
+ m = m_getcl(M_NOWAIT, MT_DATA, M_ACKCMP | M_PKTHDR);
+ else
+ m = m_gethdr(M_NOWAIT, MT_DATA);
+
+ if (__predict_false(m == NULL)) {
+ counter_u64_add(tcp_would_have_but, 1);
+ return (NULL);
+ }
+ counter_u64_add(tcp_comp_total, 1);
+ m->m_pkthdr.rcvif = lc->ifp;
+ m->m_flags |= M_ACKCMP;
+ *new_m = 1;
+ return (m);
+}
+
+/*
+ * Do BPF tap for either ACK_CMP packets or MBUF QUEUE type packets
+ * and strip all, but the IPv4/IPv6 header.
+ */
+static bool
+do_bpf_strip_and_compress(struct tcpcb *tp, struct lro_ctrl *lc,
+ struct lro_entry *le, struct mbuf **pp, struct mbuf **cmp,
+ struct mbuf **mv_to, bool *should_wake, bool bpf_req, bool lagg_bpf_req,
+ struct ifnet *lagg_ifp, bool can_append_old_cmp)
+{
+ union {
+ void *ptr;
+ struct ip *ip4;
+ struct ip6_hdr *ip6;
+ } l3;
+ struct mbuf *m;
+ struct mbuf *nm;
+ struct tcphdr *th;
+ struct tcp_ackent *ack_ent;
+ uint32_t *ts_ptr;
+ int32_t n_mbuf;
+ bool other_opts, can_compress;
+ uint8_t lro_type;
+ uint16_t iptos;
+ int tcp_hdr_offset;
+ int idx;
+
+ /* Get current mbuf. */
+ m = *pp;
+
+ /* Let the BPF see the packet */
+ if (__predict_false(bpf_req))
+ ETHER_BPF_MTAP(lc->ifp, m);
+
+ if (__predict_false(lagg_bpf_req))
+ ETHER_BPF_MTAP(lagg_ifp, m);
+
+ tcp_hdr_offset = m->m_pkthdr.lro_tcp_h_off;
+ lro_type = le->inner.data.lro_type;
+ switch (lro_type) {
+ case LRO_TYPE_NONE:
+ lro_type = le->outer.data.lro_type;
+ switch (lro_type) {
+ case LRO_TYPE_IPV4_TCP:
+ tcp_hdr_offset -= sizeof(*le->outer.ip4);
+ m->m_pkthdr.lro_etype = ETHERTYPE_IP;
+ break;
+ case LRO_TYPE_IPV6_TCP:
+ tcp_hdr_offset -= sizeof(*le->outer.ip6);
+ m->m_pkthdr.lro_etype = ETHERTYPE_IPV6;
+ break;
+ default:
+ goto compressed;
+ }
+ break;
+ case LRO_TYPE_IPV4_TCP:
+ tcp_hdr_offset -= sizeof(*le->outer.ip4);
+ m->m_pkthdr.lro_etype = ETHERTYPE_IP;
+ break;
+ case LRO_TYPE_IPV6_TCP:
+ tcp_hdr_offset -= sizeof(*le->outer.ip6);
+ m->m_pkthdr.lro_etype = ETHERTYPE_IPV6;
+ break;
+ default:
+ goto compressed;
+ }
+
+ MPASS(tcp_hdr_offset >= 0);
+
+ m_adj(m, tcp_hdr_offset);
+ m->m_flags |= M_LRO_EHDRSTRP;
+ m->m_flags &= ~M_ACKCMP;
+ m->m_pkthdr.lro_tcp_h_off -= tcp_hdr_offset;
+
+ th = tcp_lro_get_th(m);
+
+ th->th_sum = 0; /* TCP checksum is valid. */
+
+ /* Check if ACK can be compressed */
+ can_compress = tcp_lro_ack_valid(m, th, &ts_ptr, &other_opts);
+
+ /* Now lets look at the should wake states */
+ if ((other_opts == true) &&
+ ((tp->t_flags2 & TF2_DONT_SACK_QUEUE) == 0)) {
+ /*
+ * If there are other options (SACK?) and the
+ * tcp endpoint has not expressly told us it does
+ * not care about SACKS, then we should wake up.
+ */
+ *should_wake = true;
+ } else if (*should_wake == false) {
+ /* Wakeup override check if we are false here */
+ *should_wake = tcp_lro_check_wake_status(tp);
+ }
+ /* Is the ack compressable? */
+ if (can_compress == false)
+ goto done;
+ /* Does the TCP endpoint support ACK compression? */
+ if ((tp->t_flags2 & TF2_MBUF_ACKCMP) == 0)
+ goto done;
+
+ /* Lets get the TOS/traffic class field */
+ l3.ptr = mtod(m, void *);
+ switch (lro_type) {
+ case LRO_TYPE_IPV4_TCP:
+ iptos = l3.ip4->ip_tos;
+ break;
+ case LRO_TYPE_IPV6_TCP:
+ iptos = IPV6_TRAFFIC_CLASS(l3.ip6);
+ break;
+ default:
+ iptos = 0; /* Keep compiler happy. */
+ break;
+ }
+ /* Now lets get space if we don't have some already */
+ if (*cmp == NULL) {
+new_one:
+ nm = tcp_lro_get_last_if_ackcmp(lc, le, tp, &n_mbuf,
+ can_append_old_cmp);
+ if (__predict_false(nm == NULL))
+ goto done;
+ *cmp = nm;
+ if (n_mbuf) {
+ /*
+ * Link in the new cmp ack to our in-order place,
+ * first set our cmp ack's next to where we are.
+ */
+ nm->m_nextpkt = m;
+ (*pp) = nm;
+ /*
+ * Set it up so mv_to is advanced to our
+ * compressed ack. This way the caller can
+ * advance pp to the right place.
+ */
+ *mv_to = nm;
+ /*
+ * Advance it here locally as well.
+ */
+ pp = &nm->m_nextpkt;
+ }
+ } else {
+ /* We have one already we are working on */
+ nm = *cmp;
+ if (M_TRAILINGSPACE(nm) < sizeof(struct tcp_ackent)) {
+ /* We ran out of space */
+ tp->t_flags2 |= TF2_MBUF_L_ACKS;
+ goto new_one;
+ }
+ }
+ MPASS(M_TRAILINGSPACE(nm) >= sizeof(struct tcp_ackent));
+ counter_u64_add(tcp_inp_lro_compressed, 1);
+ le->compressed++;
+ /* We can add in to the one on the tail */
+ ack_ent = mtod(nm, struct tcp_ackent *);
+ idx = (nm->m_len / sizeof(struct tcp_ackent));
+ build_ack_entry(&ack_ent[idx], th, m, ts_ptr, iptos);
+
+ /* Bump the size of both pkt-hdr and len */
+ nm->m_len += sizeof(struct tcp_ackent);
+ nm->m_pkthdr.len += sizeof(struct tcp_ackent);
+compressed:
+ /* Advance to next mbuf before freeing. */
+ *pp = m->m_nextpkt;
+ m->m_nextpkt = NULL;
+ m_freem(m);
+ return (true);
+done:
+ counter_u64_add(tcp_uncomp_total, 1);
+ le->uncompressed++;
+ return (false);
+}
+
+static void
+tcp_queue_pkts(struct tcpcb *tp, struct lro_entry *le)
+{
+
+ INP_WLOCK_ASSERT(tptoinpcb(tp));
+
+ STAILQ_HEAD(, mbuf) q = { le->m_head,
+ &STAILQ_NEXT(le->m_last_mbuf, m_stailqpkt) };
+ STAILQ_CONCAT(&tp->t_inqueue, &q);
+ le->m_head = NULL;
+ le->m_last_mbuf = NULL;
+}
+
+static struct tcpcb *
+tcp_lro_lookup(struct ifnet *ifp, struct lro_parser *pa)
+{
+ struct inpcb *inp;
+
+ switch (pa->data.lro_type) {
+#ifdef INET6
+ case LRO_TYPE_IPV6_TCP:
+ inp = in6_pcblookup(&V_tcbinfo,
+ &pa->data.s_addr.v6,
+ pa->data.s_port,
+ &pa->data.d_addr.v6,
+ pa->data.d_port,
+ INPLOOKUP_WLOCKPCB,
+ ifp);
+ break;
+#endif
+#ifdef INET
+ case LRO_TYPE_IPV4_TCP:
+ inp = in_pcblookup(&V_tcbinfo,
+ pa->data.s_addr.v4,
+ pa->data.s_port,
+ pa->data.d_addr.v4,
+ pa->data.d_port,
+ INPLOOKUP_WLOCKPCB,
+ ifp);
+ break;
+#endif
+ default:
+ return (NULL);
+ }
+
+ return (intotcpcb(inp));
+}
+
+int
+tcp_lro_flush_tcphpts(struct lro_ctrl *lc, struct lro_entry *le)
+{
+ struct tcpcb *tp;
+ struct mbuf **pp, *cmp, *mv_to;
+ struct ifnet *lagg_ifp;
+ bool bpf_req, lagg_bpf_req, should_wake, can_append_old_cmp;
+
+ /* Check if packet doesn't belongs to our network interface. */
+ if ((tcplro_stacks_wanting_mbufq == 0) ||
+ (le->outer.data.vlan_id != 0) ||
+ (le->inner.data.lro_type != LRO_TYPE_NONE))
+ return (TCP_LRO_CANNOT);
+
+#ifdef INET6
+ /*
+ * Be proactive about unspecified IPv6 address in source. As
+ * we use all-zero to indicate unbounded/unconnected pcb,
+ * unspecified IPv6 address can be used to confuse us.
+ *
+ * Note that packets with unspecified IPv6 destination is
+ * already dropped in ip6_input.
+ */
+ if (__predict_false(le->outer.data.lro_type == LRO_TYPE_IPV6_TCP &&
+ IN6_IS_ADDR_UNSPECIFIED(&le->outer.data.s_addr.v6)))
+ return (TCP_LRO_CANNOT);
+
+ if (__predict_false(le->inner.data.lro_type == LRO_TYPE_IPV6_TCP &&
+ IN6_IS_ADDR_UNSPECIFIED(&le->inner.data.s_addr.v6)))
+ return (TCP_LRO_CANNOT);
+#endif
+ /* Lookup inp, if any. Returns locked TCP inpcb. */
+ tp = tcp_lro_lookup(lc->ifp,
+ (le->inner.data.lro_type == LRO_TYPE_NONE) ? &le->outer : &le->inner);
+ if (tp == NULL)
+ return (TCP_LRO_CANNOT);
+
+ counter_u64_add(tcp_inp_lro_locks_taken, 1);
+
+ /* Check if the inp is dead, Jim. */
+ if (tp->t_state == TCPS_TIME_WAIT) {
+ INP_WUNLOCK(tptoinpcb(tp));
+ return (TCP_LRO_CANNOT);
+ }
+ if (tp->t_lro_cpu == HPTS_CPU_NONE && lc->lro_cpu_is_set == 1)
+ tp->t_lro_cpu = lc->lro_last_cpu;
+ /* Check if the transport doesn't support the needed optimizations. */
+ if ((tp->t_flags2 & (TF2_SUPPORTS_MBUFQ | TF2_MBUF_ACKCMP)) == 0) {
+ INP_WUNLOCK(tptoinpcb(tp));
+ return (TCP_LRO_CANNOT);
+ }
+
+ if (tp->t_flags2 & TF2_MBUF_QUEUE_READY)
+ should_wake = false;
+ else
+ should_wake = true;
+ /* Check if packets should be tapped to BPF. */
+ bpf_req = bpf_peers_present(lc->ifp->if_bpf);
+ lagg_bpf_req = false;
+ lagg_ifp = NULL;
+ if (lc->ifp->if_type == IFT_IEEE8023ADLAG ||
+ lc->ifp->if_type == IFT_INFINIBANDLAG) {
+ struct lagg_port *lp = lc->ifp->if_lagg;
+ struct lagg_softc *sc = lp->lp_softc;
+
+ lagg_ifp = sc->sc_ifp;
+ if (lagg_ifp != NULL)
+ lagg_bpf_req = bpf_peers_present(lagg_ifp->if_bpf);
+ }
+
+ /* Strip and compress all the incoming packets. */
+ can_append_old_cmp = true;
+ cmp = NULL;
+ for (pp = &le->m_head; *pp != NULL; ) {
+ mv_to = NULL;
+ if (do_bpf_strip_and_compress(tp, lc, le, pp, &cmp, &mv_to,
+ &should_wake, bpf_req, lagg_bpf_req, lagg_ifp,
+ can_append_old_cmp) == false) {
+ /* Advance to next mbuf. */
+ pp = &(*pp)->m_nextpkt;
+ /*
+ * Once we have appended we can't look in the pending
+ * inbound packets for a compressed ack to append to.
+ */
+ can_append_old_cmp = false;
+ /*
+ * Once we append we also need to stop adding to any
+ * compressed ack we were remembering. A new cmp
+ * ack will be required.
+ */
+ cmp = NULL;
+ tcp_lro_log(tp, lc, le, NULL, 25, 0, 0, 0, 0);
+ } else if (mv_to != NULL) {
+ /* We are asked to move pp up */
+ pp = &mv_to->m_nextpkt;
+ tcp_lro_log(tp, lc, le, NULL, 24, 0, 0, 0, 0);
+ } else
+ tcp_lro_log(tp, lc, le, NULL, 26, 0, 0, 0, 0);
+ }
+ /* Update "m_last_mbuf", if any. */
+ if (pp == &le->m_head)
+ le->m_last_mbuf = *pp;
+ else
+ le->m_last_mbuf = __containerof(pp, struct mbuf, m_nextpkt);
+
+ /* Check if any data mbufs left. */
+ if (le->m_head != NULL) {
+ counter_u64_add(tcp_inp_lro_direct_queue, 1);
+ tcp_lro_log(tp, lc, le, NULL, 22, 1, tp->t_flags2, 0, 1);
+ tcp_queue_pkts(tp, le);
+ }
+ if (should_wake) {
+ /* Wakeup */
+ counter_u64_add(tcp_inp_lro_wokeup_queue, 1);
+ if ((*tp->t_fb->tfb_do_queued_segments)(tp, 0))
+ /* TCP cb gone and unlocked. */
+ return (0);
+ }
+ INP_WUNLOCK(tptoinpcb(tp));
+
+ return (0); /* Success. */
+}

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