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diff --git a/sys/netinet/tcp_hostcache.c b/sys/netinet/tcp_hostcache.c
--- a/sys/netinet/tcp_hostcache.c
+++ b/sys/netinet/tcp_hostcache.c
@@ -448,6 +448,21 @@
return (tcp_hc_update(inc, &hcm));
}
+/*
+ * External function: update send/recv socket buffer sizes (pipes).
+ */
+void
+tcp_hc_updatepipes(const struct in_conninfo *inc, uint32_t recvpipe,
+ uint32_t sendpipe)
+{
+ struct tcp_hc_metrics hcm = {
+ .hc_sendpipe = sendpipe,
+ .hc_recvpipe = recvpipe,
+ };
+
+ return (tcp_hc_update(inc, &hcm));
+}
+
/*
* External function: update the TCP metrics of an entry in the hostcache.
* Creates a new entry if none was found.
diff --git a/sys/netinet/tcp_input.c b/sys/netinet/tcp_input.c
--- a/sys/netinet/tcp_input.c
+++ b/sys/netinet/tcp_input.c
@@ -1450,6 +1450,8 @@
(so->so_rcv.sb_hiwat / 2)), V_tcp_autorcvbuf_max);
if (sbreserve_locked(so, SO_RCV, newsize, NULL)) {
TCP_PROBE2(receive__autoresize, tp, newsize);
+ tcp_hc_updatepipes(&tp->t_inpcb.inp_inc,
+ newsize, 0);
} else {
so->so_rcv.sb_flags &= ~SB_AUTOSIZE;
}
diff --git a/sys/netinet/tcp_output.c b/sys/netinet/tcp_output.c
--- a/sys/netinet/tcp_output.c
+++ b/sys/netinet/tcp_output.c
@@ -2170,6 +2170,7 @@
V_tcp_autosndbuf_max);
if (sbreserve_locked(so, SO_SND, newsize, curthread)) {
TCP_PROBE2(send__autoresize, tp, newsize);
+ tcp_hc_updatepipes(&tp->t_inpcb.inp_inc, 0, newsize);
} else {
so->so_snd.sb_flags &= ~SB_AUTOSIZE;
}
diff --git a/sys/netinet/tcp_stacks/rack.c b/sys/netinet/tcp_stacks/rack.c
--- a/sys/netinet/tcp_stacks/rack.c
+++ b/sys/netinet/tcp_stacks/rack.c
@@ -18900,6 +18900,8 @@
scaleup = V_tcp_autosndbuf_max;
if (sbreserve_locked(so, SO_SND, scaleup, curthread)) {
TCP_PROBE2(send__autoresize, tp, scaleup);
+ tcp_hc_updatepipes(&tp->t_inpcb.inp_inc, 0,
+ scaleup);
} else {
so->so_snd.sb_flags &= ~SB_AUTOSIZE;
}
diff --git a/sys/netinet/tcp_var.h b/sys/netinet/tcp_var.h
--- a/sys/netinet/tcp_var.h
+++ b/sys/netinet/tcp_var.h
@@ -1525,6 +1525,7 @@
void tcp_hc_get(const struct in_conninfo *, struct tcp_hc_metrics *);
uint32_t tcp_hc_getmtu(const struct in_conninfo *);
void tcp_hc_updatemtu(const struct in_conninfo *, uint32_t);
+void tcp_hc_updatepipes(const struct in_conninfo *, uint32_t, uint32_t);
void tcp_hc_update(const struct in_conninfo *, struct tcp_hc_metrics *);
void cc_after_idle(struct tcpcb *tp);

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