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bblog: inherit TCP_LOG option from listener

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When the TCP_LOG option is used to enable logging on a listening
socket, inherit this if the listener is not auto selected and does
not have a log id set.

Reviewed by:		cc
MFC after:		1 week
Sponsored by:		Netflix, Inc.
Differential Revision:	https://reviews.freebsd.org/D38436
This commit is contained in:
Michael Tuexen 2023-05-06 11:21:16 +02:00
parent c2399dd2e2
commit e044a0bce4
1 changed files with 17 additions and 0 deletions
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17
sys/netinet/tcp_syncache.c
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@ -90,6 +90,9 @@ __FBSDID("$FreeBSD$");
#include <netinet/tcp_var.h>
#include <netinet/tcp_syncache.h>
#include <netinet/tcp_ecn.h>
#ifdef TCP_BLACKBOX
#include <netinet/tcp_log_buf.h>
#endif
#ifdef TCP_OFFLOAD
#include <netinet/toecore.h>
#endif
@ -1013,6 +1016,20 @@ syncache_socket(struct syncache *sc, struct socket *lso, struct mbuf *m)
tod->tod_offload_socket(tod, sc->sc_todctx, so);
}
#endif
#ifdef TCP_BLACKBOX
/*
* Inherit the log state from the listening socket, if
* - the log state of the listening socket is not off and
* - the listening socket was not auto selected from all sessions and
* - a log id is not set on the listening socket.
* This avoids inheriting a log state which was automatically set.
*/
if ((tcp_get_bblog_state(sototcpcb(lso)) != TCP_LOG_STATE_OFF) &&
((sototcpcb(lso)->t_flags2 & TF2_LOG_AUTO) == 0) &&
(sototcpcb(lso)->t_lib == NULL)) {
tcp_log_state_change(tp, tcp_get_bblog_state(sototcpcb(lso)));
}
#endif
/*
* Copy and activate timers.