@@ -218,6 +218,7 @@ static void test_instance_file_read(struct tracefs_instance *inst, char *fname)
#define ALL_TRACERS "available_tracers"
#define CUR_TRACER "current_tracer"
#define PER_CPU "per_cpu"
+#define TRACE_ON "tracing_on"
static void test_instance_file(void)
{
struct tracefs_instance *instance = NULL;
@@ -322,6 +323,95 @@ static void test_instance_file(void)
free(inst_dir);
}
+static bool check_fd_name(int fd, char *name)
+{
+ char link[PATH_MAX + 1];
+ char path[PATH_MAX + 1];
+ struct stat st;
+ char *file;
+ int ret;
+
+ snprintf(link, PATH_MAX, "/proc/self/fd/%d", fd);
+ ret = lstat(link, &st);
+ CU_TEST(ret == 0);
+ if (ret < 0)
+ return false;
+ CU_TEST(S_ISLNK(st.st_mode));
+ if (!S_ISLNK(st.st_mode))
+ return false;
+ ret = readlink(link, path, PATH_MAX);
+ CU_TEST(ret > 0);
+ if (ret > PATH_MAX || ret < 0)
+ return false;
+ path[ret] = 0;
+ file = basename(path);
+ CU_TEST(file != NULL);
+ if (!file)
+ return false;
+ ret = strcmp(file, name);
+ CU_TEST(ret == 0);
+ if (ret)
+ return false;
+ return true;
+}
+
+#define FLAGS_STR "flags:"
+static bool check_fd_mode(int fd, int mode)
+{
+ char path[PATH_MAX + 1];
+ long fmode = -1;
+ char *line = NULL;
+ struct stat st;
+ size_t len = 0;
+ ssize_t size;
+ FILE *file;
+ int ret;
+
+ snprintf(path, PATH_MAX, "/proc/self/fdinfo/%d", fd);
+ ret = stat(path, &st);
+ CU_TEST(ret == 0);
+ if (ret < 0)
+ return false;
+ file = fopen(path, "r");
+ if (!file)
+ return false;
+ while ((size = getline(&line, &len, file)) > 0) {
+ if (strncmp(line, FLAGS_STR, strlen(FLAGS_STR)))
+ continue;
+ fmode = strtol(line + strlen(FLAGS_STR), NULL, 8);
+ break;
+ }
+ free(line);
+ fclose(file);
+ if (fmode < 0 ||
+ (O_ACCMODE & fmode) != (O_ACCMODE & mode))
+ return false;
+ return true;
+}
+
+static void test_instance_file_fd(void)
+{
+ const char *name = get_rand_str();
+ long long res = -1;
+ char rd[2];
+ int fd;
+
+ fd = tracefs_instance_file_open(test_instance, name, -1);
+ CU_TEST(fd == -1);
+ fd = tracefs_instance_file_open(test_instance, TRACE_ON, O_RDONLY);
+ CU_TEST(fd >= 0);
+ CU_TEST(check_fd_name(fd, TRACE_ON));
+ CU_TEST(check_fd_mode(fd, O_RDONLY));
+
+ CU_TEST(tracefs_instance_file_read_int(test_instance, TRACE_ON, &res) == 0);
+ CU_TEST((res == 0 || res == 1));
+ CU_TEST(read(fd, &rd, 1) == 1);
+ rd[1] = 0;
+ CU_TEST(res == atoi(rd));
+
+ close(fd);
+}
+
static void exclude_string(char **strings, char *name)
{
int i;
@@ -614,6 +704,8 @@ void test_tracefs_lib(void)
CU_add_test(suite, "tracing file / directory APIs",
test_trace_file);
CU_add_test(suite, "instance file / directory APIs",
+ test_instance_file_fd);
+ CU_add_test(suite, "instance file descriptor",
test_instance_file);
CU_add_test(suite, "systems and events APIs",
test_system_event);
Added unit tests for: tracefs_instance_file_open(); tracefs_instance_file_read_int(); Signed-off-by: Tzvetomir Stoyanov (VMware) <tz.stoyanov@gmail.com> --- utest/tracefs-utest.c | 92 +++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 92 insertions(+)