src/qmux_trace.c

#include <haproxy/qmux_trace.h>

#include <import/ist.h>
#include <haproxy/api.h>
#include <haproxy/connection.h>
#include <haproxy/chunk.h>
#include <haproxy/mux_quic.h>

/* trace source and events */
static void qmux_trace(enum trace_level level, uint64_t mask,
                       const struct trace_source *src,
                       const struct ist where, const struct ist func,
                       const void *a1, const void *a2, const void *a3, const void *a4);

static const struct name_desc qmux_trace_lockon_args[4] = {
	/* arg1 */ { /* already used by the connection */ },
	/* arg2 */ { .name="qcs", .desc="QUIC stream" },
	/* arg3 */ { },
	/* arg4 */ { }
};

static const struct name_desc qmux_trace_decoding[] = {
#define QMUX_VERB_CLEAN    1
	{ .name="clean",    .desc="only user-friendly stuff, generally suitable for level \"user\"" },
#define QMUX_VERB_MINIMAL  2
	{ .name="minimal",  .desc="report only qcc/qcs state and flags, no real decoding" },
	{ /* end */ }
};

struct trace_source trace_qmux = {
	.name = IST("qmux"),
	.desc = "QUIC multiplexer",
	.arg_def = TRC_ARG1_CONN,  /* TRACE()'s first argument is always a connection */
	.default_cb = qmux_trace,
	.known_events = qmux_trace_events,
	.lockon_args = qmux_trace_lockon_args,
	.decoding = qmux_trace_decoding,
	.report_events = ~0,  /* report everything by default */
};


static void qmux_trace_frm(const struct quic_frame *frm)
{
	switch (frm->type) {
	case QUIC_FT_MAX_STREAMS_BIDI:
		chunk_appendf(&trace_buf, " max_streams=%llu",
		              (ull)frm->max_streams_bidi.max_streams);
		break;

	case QUIC_FT_MAX_STREAMS_UNI:
		chunk_appendf(&trace_buf, " max_streams=%llu",
		              (ull)frm->max_streams_uni.max_streams);
		break;

	default:
		break;
	}
}

/* quic-mux trace handler */
static void qmux_trace(enum trace_level level, uint64_t mask,
                       const struct trace_source *src,
                       const struct ist where, const struct ist func,
                       const void *a1, const void *a2, const void *a3, const void *a4)
{
	const struct connection *conn = a1;
	const struct qcc *qcc   = conn ? conn->ctx : NULL;
	const struct qcs *qcs   = a2;

	if (!qcc)
		return;

	if (src->verbosity > QMUX_VERB_CLEAN) {
		chunk_appendf(&trace_buf, " : qcc=%p(F)", qcc);
		if (qcc->conn->handle.qc)
			chunk_appendf(&trace_buf, " qc=%p", qcc->conn->handle.qc);

		if (qcs)
			chunk_appendf(&trace_buf, " qcs=%p .id=%llu .st=%s",
			              qcs, (ull)qcs->id,
			              qcs_st_to_str(qcs->st));

		if (mask & QMUX_EV_QCC_NQCS) {
			const uint64_t *id = a3;
			chunk_appendf(&trace_buf, " id=%llu", (ull)*id);
		}

		if (mask & QMUX_EV_SEND_FRM)
			qmux_trace_frm(a3);

		if (mask & QMUX_EV_QCS_XFER_DATA) {
			const struct qcs_xfer_data_trace_arg *arg = a3;
			chunk_appendf(&trace_buf, " prep=%llu xfer=%d",
			              (ull)arg->prep, arg->xfer);
		}

		if (mask & QMUX_EV_QCS_BUILD_STRM) {
			const struct qcs_build_stream_trace_arg *arg = a3;
			chunk_appendf(&trace_buf, " len=%llu fin=%d offset=%llu",
			              (ull)arg->len, arg->fin, (ull)arg->offset);
		}
	}
}


/* register qmux traces */
INITCALL1(STG_REGISTER, trace_register_source, TRACE_SOURCE);