The branch main has been updated by glebius:

URL: 
https://cgit.FreeBSD.org/src/commit/?id=dd7b86e2a010818b53f42200815f1858300045d7

commit dd7b86e2a010818b53f42200815f1858300045d7
Author:     Gleb Smirnoff <[email protected]>
AuthorDate: 2024-03-18 15:56:17 +0000
Commit:     Gleb Smirnoff <[email protected]>
CommitDate: 2024-03-18 15:56:17 +0000

    tcp: remove IS_FASTOPEN() macro
    
    The macro is more obfuscating than helping as it just checks a single flag
    of t_flags.  All other t_flags bits are checked without a macro.
    
    A bigger problem was that declaration of the macro in tcp_var.h depended
    on a kernel option.  It is a bad practice to create such definitions in
    installable headers.
    
    Reviewed by:            rscheff, tuexen, kib
    Differential Revision:  https://reviews.freebsd.org/D44362
---
 sys/netinet/tcp_input.c       | 14 +++++++-------
 sys/netinet/tcp_output.c      | 14 +++++++-------
 sys/netinet/tcp_stacks/bbr.c  | 26 +++++++++++++-------------
 sys/netinet/tcp_stacks/rack.c | 35 ++++++++++++++++++-----------------
 sys/netinet/tcp_subr.c        |  2 +-
 sys/netinet/tcp_syncache.c    |  2 +-
 sys/netinet/tcp_usrreq.c      | 15 +++++++--------
 sys/netinet/tcp_var.h         |  8 --------
 8 files changed, 54 insertions(+), 62 deletions(-)

diff --git a/sys/netinet/tcp_input.c b/sys/netinet/tcp_input.c
index 8df975bcee54..8410cb490915 100644
--- a/sys/netinet/tcp_input.c
+++ b/sys/netinet/tcp_input.c
@@ -1680,7 +1680,7 @@ tcp_do_segment(struct tcpcb *tp, struct mbuf *m, struct 
tcphdr *th,
                    (tp->t_flags & TF_NOOPT))) {
                        tp->t_flags &= ~TF_SACK_PERMIT;
                }
-               if (IS_FASTOPEN(tp->t_flags)) {
+               if (tp->t_flags & TF_FASTOPEN) {
                        if ((to.to_flags & TOF_FASTOPEN) &&
                            !(tp->t_flags & TF_NOOPT)) {
                                uint16_t mss;
@@ -1989,7 +1989,7 @@ tcp_do_segment(struct tcpcb *tp, struct mbuf *m, struct 
tcphdr *th,
                                tcp_log_end_status(tp, 
TCP_EI_STATUS_RST_IN_FRONT);
                                goto dropwithreset;
                }
-               if (IS_FASTOPEN(tp->t_flags)) {
+               if (tp->t_flags & TF_FASTOPEN) {
                        /*
                         * When a TFO connection is in SYN_RECEIVED, the
                         * only valid packets are the initial SYN, a
@@ -2063,7 +2063,7 @@ tcp_do_segment(struct tcpcb *tp, struct mbuf *m, struct 
tcphdr *th,
                         * If not all the data that was sent in the TFO SYN
                         * has been acked, resend the remainder right away.
                         */
-                       if (IS_FASTOPEN(tp->t_flags) &&
+                       if ((tp->t_flags & TF_FASTOPEN) &&
                            (tp->snd_una != tp->snd_max)) {
                                tp->snd_nxt = th->th_ack;
                                tfo_partial_ack = 1;
@@ -2419,7 +2419,7 @@ tcp_do_segment(struct tcpcb *tp, struct mbuf *m, struct 
tcphdr *th,
                if (tp->t_state == TCPS_SYN_RECEIVED ||
                    (tp->t_flags & TF_NEEDSYN)) {
                        if (tp->t_state == TCPS_SYN_RECEIVED &&
-                           IS_FASTOPEN(tp->t_flags)) {
+                           (tp->t_flags & TF_FASTOPEN)) {
                                tp->snd_wnd = tiwin;
                                cc_conn_init(tp);
                        }
@@ -2467,7 +2467,7 @@ tcp_do_segment(struct tcpcb *tp, struct mbuf *m, struct 
tcphdr *th,
                 *      SYN-RECEIVED* -> FIN-WAIT-1
                 */
                tp->t_starttime = ticks;
-               if (IS_FASTOPEN(tp->t_flags) && tp->t_tfo_pending) {
+               if ((tp->t_flags & TF_FASTOPEN) && tp->t_tfo_pending) {
                        tcp_fastopen_decrement_counter(tp->t_tfo_pending);
                        tp->t_tfo_pending = NULL;
                }
@@ -2486,7 +2486,7 @@ tcp_do_segment(struct tcpcb *tp, struct mbuf *m, struct 
tcphdr *th,
                         * snd_cwnd reduction that occurs when a TFO SYN|ACK
                         * is retransmitted.
                         */
-                       if (!IS_FASTOPEN(tp->t_flags))
+                       if (!(tp->t_flags & TF_FASTOPEN))
                                cc_conn_init(tp);
                        tcp_timer_activate(tp, TT_KEEP, TP_KEEPIDLE(tp));
                }
@@ -3167,7 +3167,7 @@ dodata:                                                   
/* XXX */
         * connection then we just ignore the text.
         */
        tfo_syn = ((tp->t_state == TCPS_SYN_RECEIVED) &&
-                  IS_FASTOPEN(tp->t_flags));
+           (tp->t_flags & TF_FASTOPEN));
        if ((tlen || (thflags & TH_FIN) || (tfo_syn && tlen > 0)) &&
            TCPS_HAVERCVDFIN(tp->t_state) == 0) {
                tcp_seq save_start = th->th_seq;
diff --git a/sys/netinet/tcp_output.c b/sys/netinet/tcp_output.c
index 26a8ed70ceff..6f7bf6f8b029 100644
--- a/sys/netinet/tcp_output.c
+++ b/sys/netinet/tcp_output.c
@@ -239,10 +239,10 @@ tcp_default_output(struct tcpcb *tp)
         * only allow the initial SYN or SYN|ACK and those sent
         * by the retransmit timer.
         */
-       if (IS_FASTOPEN(tp->t_flags) &&
+       if ((tp->t_flags & TF_FASTOPEN) &&
            ((tp->t_state == TCPS_SYN_SENT) ||
-            (tp->t_state == TCPS_SYN_RECEIVED)) &&
-           SEQ_GT(tp->snd_max, tp->snd_una) && /* initial SYN or SYN|ACK sent 
*/
+           (tp->t_state == TCPS_SYN_RECEIVED)) &&
+           SEQ_GT(tp->snd_max, tp->snd_una) && /* SYN or SYN|ACK sent */
            (tp->snd_nxt != tp->snd_una))       /* not a retransmit */
                return (0);
 
@@ -436,7 +436,7 @@ after_sack_rexmit:
                 * When sending additional segments following a TFO SYN|ACK,
                 * do not include the SYN bit.
                 */
-               if (IS_FASTOPEN(tp->t_flags) &&
+               if ((tp->t_flags & TF_FASTOPEN) &&
                    (tp->t_state == TCPS_SYN_RECEIVED))
                        flags &= ~TH_SYN;
                off--, len++;
@@ -464,7 +464,7 @@ after_sack_rexmit:
         *
         *  - When the socket is in the CLOSED state (RST is being sent)
         */
-       if (IS_FASTOPEN(tp->t_flags) &&
+       if ((tp->t_flags & TF_FASTOPEN) &&
            (((flags & TH_SYN) && (tp->t_rxtshift > 0)) ||
             ((tp->t_state == TCPS_SYN_SENT) &&
              (tp->t_tfo_client_cookie_len == 0)) ||
@@ -801,7 +801,7 @@ send:
                         * have caused the original SYN or SYN|ACK to have
                         * been dropped by a middlebox.
                         */
-                       if (IS_FASTOPEN(tp->t_flags) &&
+                       if ((tp->t_flags & TF_FASTOPEN) &&
                            (tp->t_rxtshift == 0)) {
                                if (tp->t_state == TCPS_SYN_RECEIVED) {
                                        to.to_tfo_len = TCP_FASTOPEN_COOKIE_LEN;
@@ -875,7 +875,7 @@ send:
                 * If we wanted a TFO option to be added, but it was unable
                 * to fit, ensure no data is sent.
                 */
-               if (IS_FASTOPEN(tp->t_flags) && wanted_cookie &&
+               if ((tp->t_flags & TF_FASTOPEN) && wanted_cookie &&
                    !(to.to_flags & TOF_FASTOPEN))
                        len = 0;
        }
diff --git a/sys/netinet/tcp_stacks/bbr.c b/sys/netinet/tcp_stacks/bbr.c
index 934b35bd22d7..4be12e824926 100644
--- a/sys/netinet/tcp_stacks/bbr.c
+++ b/sys/netinet/tcp_stacks/bbr.c
@@ -8188,7 +8188,7 @@ bbr_process_data(struct mbuf *m, struct tcphdr *th, 
struct socket *so,
         * then we just ignore the text.
         */
        tfo_syn = ((tp->t_state == TCPS_SYN_RECEIVED) &&
-                  IS_FASTOPEN(tp->t_flags));
+           (tp->t_flags & TF_FASTOPEN));
        if ((tlen || (thflags & TH_FIN) || (tfo_syn && tlen > 0)) &&
            TCPS_HAVERCVDFIN(tp->t_state) == 0) {
                tcp_seq save_start = th->th_seq;
@@ -8773,7 +8773,7 @@ bbr_do_syn_sent(struct mbuf *m, struct tcphdr *th, struct 
socket *so,
                 * If not all the data that was sent in the TFO SYN
                 * has been acked, resend the remainder right away.
                 */
-               if (IS_FASTOPEN(tp->t_flags) &&
+               if ((tp->t_flags & TF_FASTOPEN) &&
                    (tp->snd_una != tp->snd_max)) {
                        tp->snd_nxt = th->th_ack;
                        tfo_partial = 1;
@@ -8939,7 +8939,7 @@ bbr_do_syn_recv(struct mbuf *m, struct tcphdr *th, struct 
socket *so,
                ctf_do_dropwithreset(m, tp, th, BANDLIM_RST_OPENPORT, tlen);
                return (1);
        }
-       if (IS_FASTOPEN(tp->t_flags)) {
+       if (tp->t_flags & TF_FASTOPEN) {
                /*
                 * When a TFO connection is in SYN_RECEIVED, the only valid
                 * packets are the initial SYN, a retransmit/copy of the
@@ -9015,7 +9015,7 @@ bbr_do_syn_recv(struct mbuf *m, struct tcphdr *th, struct 
socket *so,
         * processing; else drop segment and return.
         */
        if ((thflags & TH_ACK) == 0) {
-               if (IS_FASTOPEN(tp->t_flags)) {
+               if (tp->t_flags & TF_FASTOPEN) {
                        cc_conn_init(tp);
                }
                return (bbr_process_data(m, th, so, tp, drop_hdrlen, tlen,
@@ -9052,7 +9052,7 @@ bbr_do_syn_recv(struct mbuf *m, struct tcphdr *th, struct 
socket *so,
        /* Drop off any SYN in the send map (probably not there)  */
        if (thflags & TH_ACK)
                bbr_log_syn(tp, to);
-       if (IS_FASTOPEN(tp->t_flags) && tp->t_tfo_pending) {
+       if ((tp->t_flags & TF_FASTOPEN) && tp->t_tfo_pending) {
                tcp_fastopen_decrement_counter(tp->t_tfo_pending);
                tp->t_tfo_pending = NULL;
        }
@@ -9074,7 +9074,7 @@ bbr_do_syn_recv(struct mbuf *m, struct tcphdr *th, struct 
socket *so,
                 * is not harmless as it would undo the snd_cwnd reduction
                 * that occurs when a TFO SYN|ACK is retransmitted.
                 */
-               if (!IS_FASTOPEN(tp->t_flags))
+               if (!(tp->t_flags & TF_FASTOPEN))
                        cc_conn_init(tp);
        }
        /*
@@ -11408,7 +11408,7 @@ bbr_do_segment_nounlock(struct tcpcb *tp, struct mbuf 
*m, struct tcphdr *th,
                        if ((tp->t_flags & TF_SACK_PERMIT) &&
                            (to.to_flags & TOF_SACKPERM) == 0)
                                tp->t_flags &= ~TF_SACK_PERMIT;
-                       if (IS_FASTOPEN(tp->t_flags)) {
+                       if (tp->t_flags & TF_FASTOPEN) {
                                if (to.to_flags & TOF_FASTOPEN) {
                                        uint16_t mss;
 
@@ -12062,7 +12062,7 @@ bbr_output_wtime(struct tcpcb *tp, const struct timeval 
*tv)
         * For TFO connections in SYN_RECEIVED, only allow the initial
         * SYN|ACK and those sent by the retransmit timer.
         */
-       if (IS_FASTOPEN(tp->t_flags) &&
+       if ((tp->t_flags & TF_FASTOPEN) &&
            ((tp->t_state == TCPS_SYN_RECEIVED) ||
             (tp->t_state == TCPS_SYN_SENT)) &&
            SEQ_GT(tp->snd_max, tp->snd_una) && /* initial SYN or SYN|ACK sent 
*/
@@ -12381,7 +12381,7 @@ recheck_resend:
                 * When sending additional segments following a TFO SYN|ACK,
                 * do not include the SYN bit.
                 */
-               if (IS_FASTOPEN(tp->t_flags) &&
+               if ((tp->t_flags & TF_FASTOPEN) &&
                    (tp->t_state == TCPS_SYN_RECEIVED))
                        flags &= ~TH_SYN;
                sb_offset--, len++;
@@ -12412,7 +12412,7 @@ recheck_resend:
         *    actively created socket
         *  - When the socket is in the CLOSED state (RST is being sent)
         */
-       if (IS_FASTOPEN(tp->t_flags) &&
+       if ((tp->t_flags & TF_FASTOPEN) &&
            (((flags & TH_SYN) && (tp->t_rxtshift > 0)) ||
             ((tp->t_state == TCPS_SYN_SENT) &&
              (tp->t_tfo_client_cookie_len == 0)) ||
@@ -12422,7 +12422,7 @@ recheck_resend:
                rsm = NULL;
        }
        /* Without fast-open there should never be data sent on a SYN */
-       if ((flags & TH_SYN) && (!IS_FASTOPEN(tp->t_flags)))
+       if ((flags & TH_SYN) && !(tp->t_flags & TF_FASTOPEN))
                len = 0;
        if (len <= 0) {
                /*
@@ -12846,7 +12846,7 @@ send:
                         * have caused the original SYN or SYN|ACK to have
                         * been dropped by a middlebox.
                         */
-                       if (IS_FASTOPEN(tp->t_flags) &&
+                       if ((tp->t_flags & TF_FASTOPEN) &&
                            (tp->t_rxtshift == 0)) {
                                if (tp->t_state == TCPS_SYN_RECEIVED) {
                                        to.to_tfo_len = TCP_FASTOPEN_COOKIE_LEN;
@@ -12902,7 +12902,7 @@ send:
                 * If we wanted a TFO option to be added, but it was unable
                 * to fit, ensure no data is sent.
                 */
-               if (IS_FASTOPEN(tp->t_flags) && wanted_cookie &&
+               if ((tp->t_flags & TF_FASTOPEN) && wanted_cookie &&
                    !(to.to_flags & TOF_FASTOPEN))
                        len = 0;
        }
diff --git a/sys/netinet/tcp_stacks/rack.c b/sys/netinet/tcp_stacks/rack.c
index 1fe07fa8d641..f89fd46f2a85 100644
--- a/sys/netinet/tcp_stacks/rack.c
+++ b/sys/netinet/tcp_stacks/rack.c
@@ -13585,7 +13585,7 @@ rack_process_data(struct mbuf *m, struct tcphdr *th, 
struct socket *so,
         * then we just ignore the text.
         */
        tfo_syn = ((tp->t_state == TCPS_SYN_RECEIVED) &&
-                  IS_FASTOPEN(tp->t_flags));
+           (tp->t_flags & TF_FASTOPEN));
        if ((tlen || (thflags & TH_FIN) || (tfo_syn && tlen > 0)) &&
            TCPS_HAVERCVDFIN(tp->t_state) == 0) {
                tcp_seq save_start = th->th_seq;
@@ -14194,7 +14194,7 @@ rack_do_syn_sent(struct mbuf *m, struct tcphdr *th, 
struct socket *so,
                 * If not all the data that was sent in the TFO SYN
                 * has been acked, resend the remainder right away.
                 */
-               if (IS_FASTOPEN(tp->t_flags) &&
+               if ((tp->t_flags & TF_FASTOPEN) &&
                    (tp->snd_una != tp->snd_max)) {
                        /* Was it a partial ack? */
                        if (SEQ_LT(th->th_ack, tp->snd_max))
@@ -14373,7 +14373,7 @@ rack_do_syn_recv(struct mbuf *m, struct tcphdr *th, 
struct socket *so,
                ctf_do_dropwithreset(m, tp, th, BANDLIM_RST_OPENPORT, tlen);
                return (1);
        }
-       if (IS_FASTOPEN(tp->t_flags)) {
+       if (tp->t_flags & TF_FASTOPEN) {
                /*
                 * When a TFO connection is in SYN_RECEIVED, the
                 * only valid packets are the initial SYN, a
@@ -14454,7 +14454,7 @@ rack_do_syn_recv(struct mbuf *m, struct tcphdr *th, 
struct socket *so,
         * processing; else drop segment and return.
         */
        if ((thflags & TH_ACK) == 0) {
-               if (IS_FASTOPEN(tp->t_flags)) {
+               if (tp->t_flags & TF_FASTOPEN) {
                        rack_cc_conn_init(tp);
                }
                return (rack_process_data(m, th, so, tp, drop_hdrlen, tlen,
@@ -14475,7 +14475,7 @@ rack_do_syn_recv(struct mbuf *m, struct tcphdr *th, 
struct socket *so,
         * FIN-WAIT-1
         */
        tp->t_starttime = ticks;
-       if (IS_FASTOPEN(tp->t_flags) && tp->t_tfo_pending) {
+       if ((tp->t_flags & TF_FASTOPEN) && tp->t_tfo_pending) {
                tcp_fastopen_decrement_counter(tp->t_tfo_pending);
                tp->t_tfo_pending = NULL;
        }
@@ -14492,7 +14492,7 @@ rack_do_syn_recv(struct mbuf *m, struct tcphdr *th, 
struct socket *so,
                 * is not harmless as it would undo the snd_cwnd reduction
                 * that occurs when a TFO SYN|ACK is retransmitted.
                 */
-               if (!IS_FASTOPEN(tp->t_flags))
+               if (!(tp->t_flags & TF_FASTOPEN))
                        rack_cc_conn_init(tp);
        }
        /*
@@ -18198,7 +18198,7 @@ rack_do_segment_nounlock(struct tcpcb *tp, struct mbuf 
*m, struct tcphdr *th,
                        if ((tp->t_flags & TF_SACK_PERMIT) &&
                            (to.to_flags & TOF_SACKPERM) == 0)
                                tp->t_flags &= ~TF_SACK_PERMIT;
-                       if (IS_FASTOPEN(tp->t_flags)) {
+                       if (tp->t_flags & TF_FASTOPEN) {
                                if (to.to_flags & TOF_FASTOPEN) {
                                        uint16_t mss;
 
@@ -21346,7 +21346,7 @@ rack_output(struct tcpcb *tp)
         * For TFO connections in SYN_RECEIVED, only allow the initial
         * SYN|ACK and those sent by the retransmit timer.
         */
-       if (IS_FASTOPEN(tp->t_flags) &&
+       if ((tp->t_flags & TF_FASTOPEN) &&
            (tp->t_state == TCPS_SYN_RECEIVED) &&
            SEQ_GT(tp->snd_max, tp->snd_una) &&    /* initial SYN|ACK sent */
            (rack->r_ctl.rc_resend == NULL)) {         /* not a retransmit */
@@ -21494,7 +21494,7 @@ rack_output(struct tcpcb *tp)
         * only allow the initial SYN or SYN|ACK and those sent
         * by the retransmit timer.
         */
-       if (IS_FASTOPEN(tp->t_flags) &&
+       if ((tp->t_flags & TF_FASTOPEN) &&
            ((tp->t_state == TCPS_SYN_RECEIVED) ||
             (tp->t_state == TCPS_SYN_SENT)) &&
            SEQ_GT(tp->snd_max, tp->snd_una) && /* initial SYN or SYN|ACK sent 
*/
@@ -21949,7 +21949,8 @@ skip_fast_output:
        }
        SOCKBUF_LOCK(sb);
        if ((sack_rxmit == 0) &&
-           (TCPS_HAVEESTABLISHED(tp->t_state) || IS_FASTOPEN(tp->t_flags))) {
+           (TCPS_HAVEESTABLISHED(tp->t_state) ||
+           (tp->t_flags & TF_FASTOPEN))) {
                /*
                 * We are not retransmitting (sack_rxmit is 0) so we
                 * are sending new data. This is always based on snd_max.
@@ -22075,7 +22076,7 @@ skip_fast_output:
                 * no data please.
                 */
                if ((sack_rxmit == 0) &&
-                   (!IS_FASTOPEN(tp->t_flags))){
+                   !(tp->t_flags & TF_FASTOPEN)) {
                        len = 0;
                        sb_offset = 0;
                }
@@ -22135,7 +22136,7 @@ skip_fast_output:
                 * When sending additional segments following a TFO SYN|ACK,
                 * do not include the SYN bit.
                 */
-               if (IS_FASTOPEN(tp->t_flags) &&
+               if ((tp->t_flags & TF_FASTOPEN) &&
                    (tp->t_state == TCPS_SYN_RECEIVED))
                        flags &= ~TH_SYN;
        }
@@ -22160,7 +22161,7 @@ skip_fast_output:
         *
         *  - When the socket is in the CLOSED state (RST is being sent)
         */
-       if (IS_FASTOPEN(tp->t_flags) &&
+       if ((tp->t_flags & TF_FASTOPEN) &&
            (((flags & TH_SYN) && (tp->t_rxtshift > 0)) ||
             ((tp->t_state == TCPS_SYN_SENT) &&
              (tp->t_tfo_client_cookie_len == 0)) ||
@@ -22169,7 +22170,7 @@ skip_fast_output:
                len = 0;
        }
        /* Without fast-open there should never be data sent on a SYN */
-       if ((flags & TH_SYN) && (!IS_FASTOPEN(tp->t_flags))) {
+       if ((flags & TH_SYN) && !(tp->t_flags & TF_FASTOPEN)) {
                len = 0;
        }
        if ((len > segsiz) && (tcp_dsack_block_exists(tp))) {
@@ -22498,7 +22499,7 @@ just_return_nolock:
        {
                int app_limited = CTF_JR_SENT_DATA;
 
-               if ((IS_FASTOPEN(tp->t_flags) == 0) &&
+               if ((tp->t_flags & TF_FASTOPEN) == 0 &&
                    (flags & TH_FIN) &&
                    (len == 0) &&
                    (sbused(sb) == (tp->snd_max - tp->snd_una)) &&
@@ -22866,7 +22867,7 @@ send:
                         * have caused the original SYN or SYN|ACK to have
                         * been dropped by a middlebox.
                         */
-                       if (IS_FASTOPEN(tp->t_flags) &&
+                       if ((tp->t_flags & TF_FASTOPEN) &&
                            (tp->t_rxtshift == 0)) {
                                if (tp->t_state == TCPS_SYN_RECEIVED) {
                                        to.to_tfo_len = TCP_FASTOPEN_COOKIE_LEN;
@@ -22964,7 +22965,7 @@ send:
                 * If we wanted a TFO option to be added, but it was unable
                 * to fit, ensure no data is sent.
                 */
-               if (IS_FASTOPEN(tp->t_flags) && wanted_cookie &&
+               if ((tp->t_flags & TF_FASTOPEN) && wanted_cookie &&
                    !(to.to_flags & TOF_FASTOPEN))
                        len = 0;
        }
diff --git a/sys/netinet/tcp_subr.c b/sys/netinet/tcp_subr.c
index 2bb61cfcbc56..f618bc1ba04b 100644
--- a/sys/netinet/tcp_subr.c
+++ b/sys/netinet/tcp_subr.c
@@ -3282,7 +3282,7 @@ tcp_drop_syn_sent(struct inpcb *inp, int errno)
        if (tp->t_state != TCPS_SYN_SENT)
                return (inp);
 
-       if (IS_FASTOPEN(tp->t_flags))
+       if (tp->t_flags & TF_FASTOPEN)
                tcp_fastopen_disable_path(tp);
 
        tp = tcp_drop(tp, errno);
diff --git a/sys/netinet/tcp_syncache.c b/sys/netinet/tcp_syncache.c
index b462e2fd799d..c21dbbb58e31 100644
--- a/sys/netinet/tcp_syncache.c
+++ b/sys/netinet/tcp_syncache.c
@@ -1447,7 +1447,7 @@ syncache_add(struct in_conninfo *inc, struct tcpopt *to, 
struct tcphdr *th,
        win = so->sol_sbrcv_hiwat;
        ltflags = (tp->t_flags & (TF_NOOPT | TF_SIGNATURE));
 
-       if (V_tcp_fastopen_server_enable && IS_FASTOPEN(tp->t_flags) &&
+       if (V_tcp_fastopen_server_enable && (tp->t_flags & TF_FASTOPEN) &&
            (tp->t_tfo_pending != NULL) &&
            (to->to_flags & TOF_FASTOPEN)) {
                /*
diff --git a/sys/netinet/tcp_usrreq.c b/sys/netinet/tcp_usrreq.c
index 916fe33e8704..abdc2de545e9 100644
--- a/sys/netinet/tcp_usrreq.c
+++ b/sys/netinet/tcp_usrreq.c
@@ -397,7 +397,7 @@ tcp_usr_listen(struct socket *so, int backlog, struct 
thread *td)
        }
        SOCK_UNLOCK(so);
 
-       if (IS_FASTOPEN(tp->t_flags))
+       if (tp->t_flags & TF_FASTOPEN)
                tp->t_tfo_pending = tcp_fastopen_alloc_counter();
 
 out:
@@ -454,7 +454,7 @@ tcp6_usr_listen(struct socket *so, int backlog, struct 
thread *td)
        }
        SOCK_UNLOCK(so);
 
-       if (IS_FASTOPEN(tp->t_flags))
+       if (tp->t_flags & TF_FASTOPEN)
                tp->t_tfo_pending = tcp_fastopen_alloc_counter();
 
        if (error != 0)
@@ -887,8 +887,7 @@ tcp_usr_rcvd(struct socket *so, int flags)
         * application response data, or failing that, when the DELACK timer
         * expires.
         */
-       if (IS_FASTOPEN(tp->t_flags) &&
-           (tp->t_state == TCPS_SYN_RECEIVED))
+       if ((tp->t_flags & TF_FASTOPEN) && (tp->t_state == TCPS_SYN_RECEIVED))
                goto out;
 #ifdef TCP_OFFLOAD
        if (tp->t_flags & TF_TOE)
@@ -1095,7 +1094,7 @@ tcp_usr_send(struct socket *so, int flags, struct mbuf *m,
                                sbflush(&so->so_snd);
                                goto out;
                        }
-                       if (IS_FASTOPEN(tp->t_flags))
+                       if (tp->t_flags & TF_FASTOPEN)
                                tcp_fastopen_connect(tp);
                        else {
                                tp->snd_wnd = TTCP_CLIENT_SND_WND;
@@ -1161,7 +1160,7 @@ tcp_usr_send(struct socket *so, int flags, struct mbuf *m,
                        /*
                         * Not going to contemplate SYN|URG
                         */
-                       if (IS_FASTOPEN(tp->t_flags))
+                       if (tp->t_flags & TF_FASTOPEN)
                                tp->t_flags &= ~TF_FASTOPEN;
 #ifdef INET6
                        if (isipv6)
@@ -1578,7 +1577,7 @@ tcp_fill_info(const struct tcpcb *tp, struct tcp_info *ti)
                default:
                        break;
        }
-       if (IS_FASTOPEN(tp->t_flags))
+       if (tp->t_flags & TF_FASTOPEN)
                ti->tcpi_options |= TCPI_OPT_TFO;
 
        ti->tcpi_rto = tp->t_rxtcur * tick;
@@ -2685,7 +2684,7 @@ tcp_disconnect(struct tcpcb *tp)
         * socket is still open.
         */
        if (tp->t_state < TCPS_ESTABLISHED &&
-           !(tp->t_state > TCPS_LISTEN && IS_FASTOPEN(tp->t_flags))) {
+           !(tp->t_state > TCPS_LISTEN && (tp->t_flags & TF_FASTOPEN))) {
                tp = tcp_close(tp);
                KASSERT(tp != NULL,
                    ("tcp_disconnect: tcp_close() returned NULL"));
diff --git a/sys/netinet/tcp_var.h b/sys/netinet/tcp_var.h
index 7b5c57d39213..e49d682896c0 100644
--- a/sys/netinet/tcp_var.h
+++ b/sys/netinet/tcp_var.h
@@ -812,14 +812,6 @@ tcp_packets_this_ack(struct tcpcb *tp, tcp_seq ack)
 #define        ENTER_RECOVERY(t_flags) t_flags |= (TF_CONGRECOVERY | 
TF_FASTRECOVERY)
 #define        EXIT_RECOVERY(t_flags) t_flags &= ~(TF_CONGRECOVERY | 
TF_FASTRECOVERY)
 
-#if defined(_KERNEL)
-#if !defined(TCP_RFC7413)
-#define        IS_FASTOPEN(t_flags)            (false)
-#else
-#define        IS_FASTOPEN(t_flags)            (t_flags & TF_FASTOPEN)
-#endif
-#endif
-
 #define        BYTES_THIS_ACK(tp, th)  (th->th_ack - tp->snd_una)
 
 /*

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