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[PATCH 4/4] net/colo: Match is-enabled probe to tracepoint
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From: |
Roman Bolshakov |
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Subject: |
[PATCH 4/4] net/colo: Match is-enabled probe to tracepoint |
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Date: |
Thu, 16 Jul 2020 11:17:54 +0300 |
Build of QEMU with dtrace fails on macOS:
LINK x86_64-softmmu/qemu-system-x86_64
error: probe colo_compare_miscompare doesn't exist
error: Could not register probes
ld: error creating dtrace DOF section for architecture x86_64
The reason of the error is explained by Adam Leventhal [1]:
Note that is-enabled probes don't have the stability magic so I'm not
sure how things would work if only is-enabled probes were used.
net/colo code uses is-enabled probes to determine if other probes should
be used but colo_compare_miscompare itself is not used explicitly.
Linker doesn't include the symbol and build fails.
The issue can be resolved if is-enabled probe matches the actual trace
point that is used inside the test.
1. http://markmail.org/message/6grq2ygr5nwdwsnb
Fixes: f4b618360e ("colo-compare: add TCP, UDP, ICMP packet comparison")
Cc: Philippe Mathieu-Daudé <philmd@redhat.com>
Cc: Cameron Esfahani <dirty@apple.com>
Signed-off-by: Roman Bolshakov <r.bolshakov@yadro.com>
---
net/colo-compare.c | 12 +++++++-----
net/filter-rewriter.c | 8 ++++++--
net/trace-events | 2 --
3 files changed, 13 insertions(+), 9 deletions(-)
diff --git a/net/colo-compare.c b/net/colo-compare.c
index 398b7546ff..9525ed703b 100644
--- a/net/colo-compare.c
+++ b/net/colo-compare.c
@@ -327,7 +327,7 @@ static int colo_compare_packet_payload(Packet *ppkt,
uint16_t len)
{
- if (trace_event_get_state_backends(TRACE_COLO_COMPARE_MISCOMPARE)) {
+ if (trace_event_get_state_backends(TRACE_COLO_COMPARE_IP_INFO)) {
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));
@@ -492,7 +492,7 @@ sec:
g_queue_push_head(&conn->primary_list, ppkt);
g_queue_push_head(&conn->secondary_list, spkt);
- if (trace_event_get_state_backends(TRACE_COLO_COMPARE_MISCOMPARE)) {
+ if (trace_event_get_state_backends(TRACE_COLO_COMPARE_TCP_INFO)) {
qemu_hexdump((char *)ppkt->data, stderr,
"colo-compare ppkt", ppkt->size);
qemu_hexdump((char *)spkt->data, stderr,
@@ -533,7 +533,8 @@ static int colo_packet_compare_udp(Packet *spkt, Packet
*ppkt)
ppkt->size - offset)) {
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_backends(TRACE_COLO_COMPARE_MISCOMPARE)) {
+ if (trace_event_get_state_backends(
+ TRACE_COLO_COMPARE_UDP_MISCOMPARE)) {
qemu_hexdump((char *)ppkt->data, stderr, "colo-compare pri pkt",
ppkt->size);
qemu_hexdump((char *)spkt->data, stderr, "colo-compare sec pkt",
@@ -576,7 +577,8 @@ 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_backends(TRACE_COLO_COMPARE_MISCOMPARE)) {
+ if (trace_event_get_state_backends(
+ TRACE_COLO_COMPARE_ICMP_MISCOMPARE)) {
qemu_hexdump((char *)ppkt->data, stderr, "colo-compare pri pkt",
ppkt->size);
qemu_hexdump((char *)spkt->data, stderr, "colo-compare sec pkt",
@@ -597,7 +599,7 @@ static int colo_packet_compare_other(Packet *spkt, Packet
*ppkt)
uint16_t offset = ppkt->vnet_hdr_len;
trace_colo_compare_main("compare other");
- if (trace_event_get_state_backends(TRACE_COLO_COMPARE_MISCOMPARE)) {
+ if (trace_event_get_state_backends(TRACE_COLO_COMPARE_IP_INFO)) {
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 1aaad101b6..ff04165cc4 100644
--- a/net/filter-rewriter.c
+++ b/net/filter-rewriter.c
@@ -76,7 +76,9 @@ static int handle_primary_tcp_pkt(RewriterState *rf,
struct tcp_hdr *tcp_pkt;
tcp_pkt = (struct tcp_hdr *)pkt->transport_header;
- if (trace_event_get_state_backends(TRACE_COLO_FILTER_REWRITER_DEBUG)) {
+ if (trace_event_get_state_backends(TRACE_COLO_FILTER_REWRITER_PKT_INFO) ||
+ trace_event_get_state_backends(
+ TRACE_COLO_FILTER_REWRITER_CONN_OFFSET)) {
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),
@@ -180,7 +182,9 @@ static int handle_secondary_tcp_pkt(RewriterState *rf,
tcp_pkt = (struct tcp_hdr *)pkt->transport_header;
- if (trace_event_get_state_backends(TRACE_COLO_FILTER_REWRITER_DEBUG)) {
+ if (trace_event_get_state_backends(TRACE_COLO_FILTER_REWRITER_PKT_INFO) ||
+ trace_event_get_state_backends(
+ TRACE_COLO_FILTER_REWRITER_CONN_OFFSET)) {
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),
diff --git a/net/trace-events b/net/trace-events
index fa49c71533..bfaff7891d 100644
--- a/net/trace-events
+++ b/net/trace-events
@@ -17,10 +17,8 @@ colo_compare_udp_miscompare(const char *sta, int size) ": %s
= %d"
colo_compare_icmp_miscompare(const char *sta, int size) ": %s = %d"
colo_compare_ip_info(int psize, const char *sta, const char *stb, int ssize,
const char *stc, const char *std) "ppkt size = %d, ip_src = %s, ip_dst = %s,
spkt size = %d, ip_src = %s, ip_dst = %s"
colo_old_packet_check_found(int64_t old_time) "%" PRId64
-colo_compare_miscompare(void) ""
colo_compare_tcp_info(const char *pkt, uint32_t seq, uint32_t ack, int hdlen,
int pdlen, int offset, int flags) "%s: seq/ack= %u/%u hdlen= %d pdlen= %d
offset= %d flags=%d"
# filter-rewriter.c
-colo_filter_rewriter_debug(void) ""
colo_filter_rewriter_pkt_info(const char *func, const char *src, const char
*dst, uint32_t seq, uint32_t ack, uint32_t flag) "%s: src/dst: %s/%s p:
seq/ack=%u/%u flags=0x%x"
colo_filter_rewriter_conn_offset(uint32_t offset) ": offset=%u"
--
2.26.1