From: Christopher Faulet <cfaulet@haproxy.com>
Date: Wed, 5 Feb 2025 15:04:26 +0000 (+0100)
Subject: MINOR: mux-spop/mux-fcgi: Add support of the debug string for logs
X-Git-Tag: v3.2-dev5~18
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=0aa69e78656f48256798686f7ee06eb3ba3e5004;p=thirdparty%2Fhaproxy.git

MINOR: mux-spop/mux-fcgi: Add support of the debug string for logs

Now it is possible to have debug info about FCGI and SPOP multiplexers. To do
so, the support for the MUX_SCTL_DBG_STR command was implemented for these
muxes.

The have this log message, the log-format must be set to:

  log-format "$HAPROXY_HTTP_LOG_FMT bs=<%[bs.debug_str]>"
---

diff --git a/src/mux_fcgi.c b/src/mux_fcgi.c
index 0de287507..289c85c23 100644
--- a/src/mux_fcgi.c
+++ b/src/mux_fcgi.c
@@ -299,6 +299,8 @@ static void fcgi_strm_notify_recv(struct fcgi_strm *fstrm);
 static void fcgi_strm_notify_send(struct fcgi_strm *fstrm);
 static void fcgi_strm_alert(struct fcgi_strm *fstrm);
 static int fcgi_strm_send_abort(struct fcgi_conn *fconn, struct fcgi_strm *fstrm);
+static int fcgi_dump_fcgi_conn_info(struct buffer *msg, struct fcgi_conn *fconn, const char *pfx);
+static int fcgi_dump_fcgi_strm_info(struct buffer *msg, const struct fcgi_strm *fstrm, const char *pfx);
 
 /* a dummy closed endpoint */
 static const struct sedesc closed_ep = {
@@ -3233,12 +3235,32 @@ static int fcgi_sctl(struct stconn *sc, enum mux_sctl_type mux_sctl, void *outpu
 {
 	int ret = 0;
 	struct fcgi_strm *fstrm = __sc_mux_strm(sc);
+	union mux_sctl_dbg_str_ctx *dbg_ctx;
+	struct buffer *buf;
 
 	switch (mux_sctl) {
 	case MUX_SCTL_SID:
 		if (output)
 			*((int64_t *)output) = fstrm->id;
 		return ret;
+	case MUX_SCTL_DBG_STR:
+		dbg_ctx = output;
+		buf = get_trash_chunk();
+
+		if (dbg_ctx->arg.debug_flags & MUX_SCTL_DBG_STR_L_MUXS)
+			fcgi_dump_fcgi_strm_info(buf, fstrm, NULL);
+
+		if (dbg_ctx->arg.debug_flags & MUX_SCTL_DBG_STR_L_MUXC)
+			fcgi_dump_fcgi_conn_info(buf, fstrm->fconn, NULL);
+
+		if (dbg_ctx->arg.debug_flags & MUX_SCTL_DBG_STR_L_CONN)
+			chunk_appendf(buf, " conn.flg=%#08x conn.err_code=%u conn.evts=%s",
+				      fstrm->fconn->conn->flags, fstrm->fconn->conn->err_code,
+				      tevt_evts2str(fstrm->fconn->conn->term_evts_log));
+
+		/* other layers not implemented */
+		dbg_ctx->ret.buf = *buf;
+		return ret;
 	case MUX_SCTL_TEVTS:
 		return fstrm->sd->term_evts_log;
 	default:
diff --git a/src/mux_spop.c b/src/mux_spop.c
index 4667f6c27..6f4794676 100644
--- a/src/mux_spop.c
+++ b/src/mux_spop.c
@@ -266,6 +266,8 @@ static void spop_strm_notify_send(struct spop_strm *spop_strm);
 static void spop_strm_alert(struct spop_strm *spop_strm);
 static inline void spop_remove_from_list(struct spop_strm *spop_strm);
 static inline void spop_conn_restart_reading(const struct spop_conn *spop_conn, int consider_buffer);
+static int spop_dump_spop_conn_info(struct buffer *msg, struct spop_conn *spop_conn, const char *pfx);
+static int spop_dump_spop_strm_info(struct buffer *msg, const struct spop_strm *spop_strm, const char *pfx);
 
 /* a dummy closed endpoint */
 static const struct sedesc closed_ep = {
@@ -2671,12 +2673,32 @@ static int spop_sctl(struct stconn *sc, enum mux_sctl_type mux_sctl, void *outpu
 {
 	int ret = 0;
 	struct spop_strm *spop_strm = __sc_mux_strm(sc);
+	union mux_sctl_dbg_str_ctx *dbg_ctx;
+	struct buffer *buf;
 
 	switch (mux_sctl) {
 	case MUX_SCTL_SID:
 		if (output)
 			*((int64_t *)output) = spop_strm->id;
 		return ret;
+	case MUX_SCTL_DBG_STR:
+		dbg_ctx = output;
+		buf = get_trash_chunk();
+
+		if (dbg_ctx->arg.debug_flags & MUX_SCTL_DBG_STR_L_MUXS)
+			spop_dump_spop_strm_info(buf, spop_strm, NULL);
+
+		if (dbg_ctx->arg.debug_flags & MUX_SCTL_DBG_STR_L_MUXC)
+			spop_dump_spop_conn_info(buf, spop_strm->spop_conn, NULL);
+
+		if (dbg_ctx->arg.debug_flags & MUX_SCTL_DBG_STR_L_CONN)
+			chunk_appendf(buf, " conn.flg=%#08x conn.err_code=%u conn.evts=%s",
+				      spop_strm->spop_conn->conn->flags, spop_strm->spop_conn->conn->err_code,
+				      tevt_evts2str(spop_strm->spop_conn->conn->term_evts_log));
+
+		/* other layers not implemented */
+		dbg_ctx->ret.buf = *buf;
+		return ret;
 	case MUX_SCTL_TEVTS:
 		return spop_strm->sd->term_evts_log;
 	default: