git: 8d4f495df465 - main - ddb: improve show tcpcb

[Michael Tuexen]

The branch main has been updated by tuexen:

URL: 
https://cgit.FreeBSD.org/src/commit/?id=8d4f495df46567dcfcbec59794e9b9137b2f38fe

commit 8d4f495df46567dcfcbec59794e9b9137b2f38fe
Author:     Michael Tuexen <tue...@freebsd.org>
AuthorDate: 2025-05-28 10:10:51 +0000
Commit:     Michael Tuexen <tue...@freebsd.org>
CommitDate: 2025-05-28 10:10:51 +0000

    ddb: improve show tcpcb
    
    Print the name of the TCP function block and the name of the
    congestion control algorithm. Furthermore, print some information
    related to Black Box Logging.
    
    Reviewed by:            thj
    MFC after:              1 week
    Sponsored by:           Netflix, Inc.
    Differential Revision:  https://reviews.freebsd.org/D50535
---
 sys/netinet/tcp_usrreq.c | 52 ++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 52 insertions(+)

diff --git a/sys/netinet/tcp_usrreq.c b/sys/netinet/tcp_usrreq.c
index 61ca29dc0ad2..5be4c399893a 100644
--- a/sys/netinet/tcp_usrreq.c
+++ b/sys/netinet/tcp_usrreq.c
@@ -3045,6 +3045,43 @@ db_print_toobflags(char t_oobflags)
        }
 }
 
+static void
+db_print_bblog_state(int state)
+{
+       switch (state) {
+       case TCP_LOG_STATE_RATIO_OFF:
+               db_printf("TCP_LOG_STATE_RATIO_OFF");
+               break;
+       case TCP_LOG_STATE_CLEAR:
+               db_printf("TCP_LOG_STATE_CLEAR");
+               break;
+       case TCP_LOG_STATE_OFF:
+               db_printf("TCP_LOG_STATE_OFF");
+               break;
+       case TCP_LOG_STATE_TAIL:
+               db_printf("TCP_LOG_STATE_TAIL");
+               break;
+       case TCP_LOG_STATE_HEAD:
+               db_printf("TCP_LOG_STATE_HEAD");
+               break;
+       case TCP_LOG_STATE_HEAD_AUTO:
+               db_printf("TCP_LOG_STATE_HEAD_AUTO");
+               break;
+       case TCP_LOG_STATE_CONTINUAL:
+               db_printf("TCP_LOG_STATE_CONTINUAL");
+               break;
+       case TCP_LOG_STATE_TAIL_AUTO:
+               db_printf("TCP_LOG_STATE_TAIL_AUTO");
+               break;
+       case TCP_LOG_VIA_BBPOINTS:
+               db_printf("TCP_LOG_STATE_BBPOINTS");
+               break;
+       default:
+               db_printf("UNKNOWN(%d)", state);
+               break;
+       }
+}
+
 static void
 db_print_tcpcb(struct tcpcb *tp, const char *name, int indent)
 {
@@ -3156,6 +3193,21 @@ db_print_tcpcb(struct tcpcb *tp, const char *name, int 
indent)
        db_print_indent(indent);
        db_printf("t_rttlow: %d   rfbuf_ts: %u   rfbuf_cnt: %d\n",
            tp->t_rttlow, tp->rfbuf_ts, tp->rfbuf_cnt);
+
+       db_print_indent(indent);
+       db_printf("t_fb.tfb_tcp_block_name: %s\n", 
tp->t_fb->tfb_tcp_block_name);
+
+       db_print_indent(indent);
+       db_printf("t_cc.name: %s\n", tp->t_cc->name);
+
+       db_print_indent(indent);
+       db_printf("_t_logstate: %d (", tp->_t_logstate);
+       db_print_bblog_state(tp->_t_logstate);
+       db_printf(")\n");
+
+       db_print_indent(indent);
+       db_printf("t_lognum: %d   t_loglimit: %d   t_logsn: %u\n",
+           tp->t_lognum, tp->t_loglimit, tp->t_logsn);
 }
 
 DB_SHOW_COMMAND(tcpcb, db_show_tcpcb)