sd-bus: test-bus-kernel-benchmark: don't rely on fixed unique names

The kernel part of kdbus does not allow userspace to make any assumption on
which unique address the first user on the bus will get.

Instead, use sd_bus_get_unique_name() to get the server's address.

1 files changed, 25 insertions, 16 deletions

diff --git a/src/libsystemd/sd-bus/test-bus-kernel-benchmark.c b/src/libsystemd/sd-bus/test-bus-kernel-benchmark.c
index 1cacb95df3..f480b655dd 100644
--- a/src/libsystemd/sd-bus/test-bus-kernel-benchmark.c
+++ b/src/libsystemd/sd-bus/test-bus-kernel-benchmark.c
@@ -56,7 +56,8 @@ static void server(sd_bus *b, size_t *result) {
                         /* Make sure the mmap is mapped */
                         assert_se(sd_bus_message_read_array(m, 'y', &p, &sz) > 0);
 
-                        assert_se(sd_bus_reply_method_return(m, NULL) >= 0);
+                        r = sd_bus_reply_method_return(m, NULL);
+                        assert_se(r >= 0);
                 } else if (sd_bus_message_is_method_call(m, "benchmark.server", "Exit")) {
                         uint64_t res;
                         assert_se(sd_bus_message_read(m, "t", &res) > 0);
@@ -69,11 +70,11 @@ static void server(sd_bus *b, size_t *result) {
         }
 }
 
-static void transaction(sd_bus *b, size_t sz) {
+static void transaction(sd_bus *b, size_t sz, const char *server_name) {
         _cleanup_bus_message_unref_ sd_bus_message *m = NULL, *reply = NULL;
         uint8_t *p;
 
-        assert_se(sd_bus_message_new_method_call(b, &m, ":1.1", "/", "benchmark.server", "Work") >= 0);
+        assert_se(sd_bus_message_new_method_call(b, &m, server_name, "/", "benchmark.server", "Work") >= 0);
         assert_se(sd_bus_message_append_array_space(m, 'y', sz, (void**) &p) >= 0);
 
         memset(p, 0x80, sz);
@@ -81,7 +82,7 @@ static void transaction(sd_bus *b, size_t sz) {
         assert_se(sd_bus_call(b, m, 0, NULL, &reply) >= 0);
 }
 
-static void client_bisect(const char *address) {
+static void client_bisect(const char *address, const char *server_name) {
         _cleanup_bus_message_unref_ sd_bus_message *x = NULL;
         size_t lsize, rsize, csize;
         sd_bus *b;
@@ -96,7 +97,8 @@ static void client_bisect(const char *address) {
         r = sd_bus_start(b);
         assert_se(r >= 0);
 
-        assert_se(sd_bus_call_method(b, ":1.1", "/", "benchmark.server", "Ping", NULL, NULL, NULL) >= 0);
+        r = sd_bus_call_method(b, server_name, "/", "benchmark.server", "Ping", NULL, NULL, NULL);
+        assert_se(r >= 0);
 
         lsize = 1;
         rsize = MAX_SIZE;
@@ -121,7 +123,7 @@ static void client_bisect(const char *address) {
 
                 t = now(CLOCK_MONOTONIC);
                 for (n_copying = 0;; n_copying++) {
-                        transaction(b, csize);
+                        transaction(b, csize, server_name);
                         if (now(CLOCK_MONOTONIC) >= t + arg_loop_usec)
                                 break;
                 }
@@ -131,7 +133,7 @@ static void client_bisect(const char *address) {
 
                 t = now(CLOCK_MONOTONIC);
                 for (n_memfd = 0;; n_memfd++) {
-                        transaction(b, csize);
+                        transaction(b, csize, server_name);
                         if (now(CLOCK_MONOTONIC) >= t + arg_loop_usec)
                                 break;
                 }
@@ -147,14 +149,14 @@ static void client_bisect(const char *address) {
         }
 
         b->use_memfd = 1;
-        assert_se(sd_bus_message_new_method_call(b, &x, ":1.1", "/", "benchmark.server", "Exit") >= 0);
+        assert_se(sd_bus_message_new_method_call(b, &x, server_name, "/", "benchmark.server", "Exit") >= 0);
         assert_se(sd_bus_message_append(x, "t", csize) >= 0);
         assert_se(sd_bus_send(b, x, NULL) >= 0);
 
         sd_bus_unref(b);
 }
 
-static void client_chart(const char *address) {
+static void client_chart(const char *address, const char *server_name) {
         _cleanup_bus_message_unref_ sd_bus_message *x = NULL;
         size_t csize;
         sd_bus *b;
@@ -169,7 +171,7 @@ static void client_chart(const char *address) {
         r = sd_bus_start(b);
         assert_se(r >= 0);
 
-        assert_se(sd_bus_call_method(b, ":1.1", "/", "benchmark.server", "Ping", NULL, NULL, NULL) >= 0);
+        assert_se(sd_bus_call_method(b, server_name, "/", "benchmark.server", "Ping", NULL, NULL, NULL) >= 0);
 
         printf("SIZE\tCOPY\tMEMFD\n");
 
@@ -183,7 +185,7 @@ static void client_chart(const char *address) {
 
                 t = now(CLOCK_MONOTONIC);
                 for (n_copying = 0;; n_copying++) {
-                        transaction(b, csize);
+                        transaction(b, csize, server_name);
                         if (now(CLOCK_MONOTONIC) >= t + arg_loop_usec)
                                 break;
                 }
@@ -194,7 +196,7 @@ static void client_chart(const char *address) {
 
                 t = now(CLOCK_MONOTONIC);
                 for (n_memfd = 0;; n_memfd++) {
-                        transaction(b, csize);
+                        transaction(b, csize, server_name);
                         if (now(CLOCK_MONOTONIC) >= t + arg_loop_usec)
                                 break;
                 }
@@ -203,7 +205,7 @@ static void client_chart(const char *address) {
         }
 
         b->use_memfd = 1;
-        assert_se(sd_bus_message_new_method_call(b, &x, ":1.1", "/", "benchmark.server", "Exit") >= 0);
+        assert_se(sd_bus_message_new_method_call(b, &x, server_name, "/", "benchmark.server", "Exit") >= 0);
         assert_se(sd_bus_message_append(x, "t", csize) >= 0);
         assert_se(sd_bus_send(b, x, NULL) >= 0);
 
@@ -216,8 +218,9 @@ int main(int argc, char *argv[]) {
                 MODE_CHART,
         } mode = MODE_BISECT;
         int i;
-        _cleanup_free_ char *name = NULL, *bus_name = NULL, *address = NULL;
+        _cleanup_free_ char *name = NULL, *bus_name = NULL, *address = NULL, *server_name = NULL;
         _cleanup_close_ int bus_ref = -1;
+        const char *unique;
         cpu_set_t cpuset;
         size_t result;
         sd_bus *b;
@@ -255,6 +258,12 @@ int main(int argc, char *argv[]) {
         r = sd_bus_start(b);
         assert_se(r >= 0);
 
+        r = sd_bus_get_unique_name(b, &unique);
+        assert_se(r >= 0);
+
+        server_name = strdup(unique);
+        assert_se(server_name);
+
         sync();
         setpriority(PRIO_PROCESS, 0, -19);
 
@@ -271,11 +280,11 @@ int main(int argc, char *argv[]) {
 
                 switch (mode) {
                 case MODE_BISECT:
-                        client_bisect(address);
+                        client_bisect(address, server_name);
                         break;
 
                 case MODE_CHART:
-                        client_chart(address);
+                        client_chart(address, server_name);
                         break;
                 }