diff options
| author | Stefan Hajnoczi <stefanha@redhat.com> | 2017-07-31 15:07:18 +0100 |
|---|---|---|
| committer | Stefan Hajnoczi <stefanha@redhat.com> | 2017-08-01 12:13:07 +0100 |
| commit | d87aa138039a4be6d705793fd3e397c69c52405a (patch) | |
| tree | f0880c8b8daf9469aa4df2c93b256d3f044898ce /net | |
| parent | 3932ef3ffb54baf22ab05767e827bda1834d20df (diff) | |
trace: add trace_event_get_state_backends()
Code that checks dstate is unaware of SystemTap and LTTng UST dstate, so
the following trace event will not fire when solely enabled by SystemTap
or LTTng UST:
if (trace_event_get_state(TRACE_MY_EVENT)) {
str = g_strdup_printf("Expensive string to generate ...",
...);
trace_my_event(str);
g_free(str);
}
Add trace_event_get_state_backends() to fetch backend dstate. Those
backends that use QEMU dstate fetch it as part of
generate_h_backend_dstate().
Update existing trace_event_get_state() callers to use
trace_event_get_state_backends() instead.
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Message-id: 20170731140718.22010-3-stefanha@redhat.com
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Diffstat (limited to 'net')
| -rw-r--r-- | net/colo-compare.c | 11 | ||||
| -rw-r--r-- | net/filter-rewriter.c | 4 |
2 files changed, 8 insertions, 7 deletions
diff --git a/net/colo-compare.c b/net/colo-compare.c index ca67c68615..5fe8e3fad9 100644 --- a/net/colo-compare.c +++ b/net/colo-compare.c @@ -188,7 +188,7 @@ static int packet_enqueue(CompareState *s, int mode) */ static int colo_packet_compare_common(Packet *ppkt, Packet *spkt, int offset) { - if (trace_event_get_state(TRACE_COLO_COMPARE_MISCOMPARE)) { + if (trace_event_get_state_backends(TRACE_COLO_COMPARE_MISCOMPARE)) { char pri_ip_src[20], pri_ip_dst[20], sec_ip_src[20], sec_ip_dst[20]; strcpy(pri_ip_src, inet_ntoa(ppkt->ip->ip_src)); @@ -274,7 +274,8 @@ static int colo_packet_compare_tcp(Packet *spkt, Packet *ppkt) res = -1; } - if (res != 0 && trace_event_get_state(TRACE_COLO_COMPARE_MISCOMPARE)) { + if (res != 0 && + trace_event_get_state_backends(TRACE_COLO_COMPARE_MISCOMPARE)) { char pri_ip_src[20], pri_ip_dst[20], sec_ip_src[20], sec_ip_dst[20]; strcpy(pri_ip_src, inet_ntoa(ppkt->ip->ip_src)); @@ -334,7 +335,7 @@ static int colo_packet_compare_udp(Packet *spkt, Packet *ppkt) if (ret) { trace_colo_compare_udp_miscompare("primary pkt size", ppkt->size); trace_colo_compare_udp_miscompare("Secondary pkt size", spkt->size); - if (trace_event_get_state(TRACE_COLO_COMPARE_MISCOMPARE)) { + if (trace_event_get_state_backends(TRACE_COLO_COMPARE_MISCOMPARE)) { qemu_hexdump((char *)ppkt->data, stderr, "colo-compare pri pkt", ppkt->size); qemu_hexdump((char *)spkt->data, stderr, "colo-compare sec pkt", @@ -371,7 +372,7 @@ static int colo_packet_compare_icmp(Packet *spkt, Packet *ppkt) ppkt->size); trace_colo_compare_icmp_miscompare("Secondary pkt size", spkt->size); - if (trace_event_get_state(TRACE_COLO_COMPARE_MISCOMPARE)) { + if (trace_event_get_state_backends(TRACE_COLO_COMPARE_MISCOMPARE)) { qemu_hexdump((char *)ppkt->data, stderr, "colo-compare pri pkt", ppkt->size); qemu_hexdump((char *)spkt->data, stderr, "colo-compare sec pkt", @@ -390,7 +391,7 @@ static int colo_packet_compare_icmp(Packet *spkt, Packet *ppkt) static int colo_packet_compare_other(Packet *spkt, Packet *ppkt) { trace_colo_compare_main("compare other"); - if (trace_event_get_state(TRACE_COLO_COMPARE_MISCOMPARE)) { + if (trace_event_get_state_backends(TRACE_COLO_COMPARE_MISCOMPARE)) { char pri_ip_src[20], pri_ip_dst[20], sec_ip_src[20], sec_ip_dst[20]; strcpy(pri_ip_src, inet_ntoa(ppkt->ip->ip_src)); diff --git a/net/filter-rewriter.c b/net/filter-rewriter.c index 55a6cf56fd..98120095de 100644 --- a/net/filter-rewriter.c +++ b/net/filter-rewriter.c @@ -69,7 +69,7 @@ static int handle_primary_tcp_pkt(NetFilterState *nf, struct tcphdr *tcp_pkt; tcp_pkt = (struct tcphdr *)pkt->transport_header; - if (trace_event_get_state(TRACE_COLO_FILTER_REWRITER_DEBUG)) { + if (trace_event_get_state_backends(TRACE_COLO_FILTER_REWRITER_DEBUG)) { trace_colo_filter_rewriter_pkt_info(__func__, inet_ntoa(pkt->ip->ip_src), inet_ntoa(pkt->ip->ip_dst), ntohl(tcp_pkt->th_seq), ntohl(tcp_pkt->th_ack), @@ -115,7 +115,7 @@ static int handle_secondary_tcp_pkt(NetFilterState *nf, tcp_pkt = (struct tcphdr *)pkt->transport_header; - if (trace_event_get_state(TRACE_COLO_FILTER_REWRITER_DEBUG)) { + if (trace_event_get_state_backends(TRACE_COLO_FILTER_REWRITER_DEBUG)) { trace_colo_filter_rewriter_pkt_info(__func__, inet_ntoa(pkt->ip->ip_src), inet_ntoa(pkt->ip->ip_dst), ntohl(tcp_pkt->th_seq), ntohl(tcp_pkt->th_ack), |