[PATCH 08/10] selftests/sched: Migrate cs_prctl_test to kselfttest

16 Feb 2024

This test begs to be a kselftest, is in the kselftest hierarchy and does
not even use a single kselftest API. Convert it.
It simplifies some of the code and the output also looks much nicer now:
Totals: pass:17 fail:0 xfail:0 xpass:0 skip:0 error:0
Signed-off-by: Joel Fernandes (Google) joel@joelfernandes.org
---
 tools/testing/selftests/sched/Makefile        |  6 +-
 tools/testing/selftests/sched/cs_prctl_test.c | 74 ++++++++++---------
 2 files changed, 43 insertions(+), 37 deletions(-)

diff --git a/tools/testing/selftests/sched/Makefile b/tools/testing/selftests/sched/Makefile
index f491d741cb45..90c53bc1337e 100644
--- a/tools/testing/selftests/sched/Makefile
+++ b/tools/testing/selftests/sched/Makefile
@@ -1,9 +1,11 @@
 # SPDX-License-Identifier: GPL-2.0+
 TEST_GEN_PROGS := cs_dlserver_test
-
-cs_dlserver_test: cs_dlserver_test.c common.c
+TEST_GEN_PROGS += cs_prctl_test
CFLAGS += $(KHDR_INCLUDES)
 CFLAGS += -Wall
include ../lib.mk
+
+$(OUTPUT)/cs_dlserver_test: cs_dlserver_test.c common.c
+$(OUTPUT)/cs_prctl_test: cs_prctl_test.c common.c
diff --git a/tools/testing/selftests/sched/cs_prctl_test.c b/tools/testing/selftests/sched/cs_prctl_test.c
index 7ba057154343..bb7aee703cdf 100644
--- a/tools/testing/selftests/sched/cs_prctl_test.c
+++ b/tools/testing/selftests/sched/cs_prctl_test.c
@@ -28,10 +28,11 @@
 #include <unistd.h>
 #include <time.h>
 #include <errno.h>
-#include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
+#include "common.h"
+
 #if __GLIBC_PREREQ(2, 30) == 0
 #include <sys/syscall.h>
 static pid_t gettid(void)
@@ -80,7 +81,7 @@ static int _prctl(int option, unsigned long arg2, unsigned long arg3, unsigned l
    int res;
res = prctl(option, arg2, arg3, arg4, arg5);
-	printf("%d = prctl(%d, %ld, %ld, %ld, %lx)\n", res, option, (long)arg2, (long)arg3,
+	ksft_print_msg("%d = prctl(%d, %ld, %ld, %ld, %lx)\n", res, option, (long)arg2, (long)arg3,
           (long)arg4, arg5);
    return res;
 }
@@ -91,21 +92,20 @@ static int _prctl(int option, unsigned long arg2, unsigned long arg3, unsigned l
 static void __handle_error(char *fn, int ln, char *msg)
 {
    int pidx;
-	printf("(%s:%d) - ", fn, ln);
+	ksft_print_msg("(%s:%d) - ", fn, ln);
    perror(msg);
    if (need_cleanup) {
    	for (pidx = 0; pidx < num_processes; ++pidx)
    		kill(procs[pidx].cpid, 15);
    	need_cleanup = 0;
    }
-	exit(EXIT_FAILURE);
+	ksft_exit_fail();
 }
static void handle_usage(int rc, char *msg)
 {
-	puts(USAGE);
-	puts(msg);
-	putchar('\n');
+	ksft_print_msg("%s\n", USAGE);
+	ksft_print_msg("%s\n\n", msg);
    exit(rc);
 }
@@ -117,7 +117,7 @@ static unsigned long get_cs_cookie(int pid)
    ret = prctl(PR_SCHED_CORE, PR_SCHED_CORE_GET, pid, PIDTYPE_PID,
    	    (unsigned long)&cookie);
    if (ret) {
-		printf("Not a core sched system\n");
+		ksft_print_msg("Not a core sched system\n");
    	return -1UL;
    }
@@ -160,7 +160,7 @@ static int child_func_process(void *arg)
ret = write(ca->pfd[1], &ca->thr_tids, sizeof(int) * ca->num_threads);
    if (ret == -1)
-		printf("write failed on pfd[%d] - error (%s)\n",
+		ksft_print_msg("write failed on pfd[%d] - error (%s)\n",
    		ca->pfd[1], strerror(errno));
close(ca->pfd[1]);
@@ -192,7 +192,7 @@ void create_processes(int num_processes, int num_threads, struct child_args proc
    for (i = 0; i < num_processes; ++i) {
    	ret = read(proc[i].pfd[0], &proc[i].thr_tids, sizeof(int) * proc[i].num_threads);
    	if (ret == -1)
-			printf("read failed on proc[%d].pfd[0] error (%s)\n",
+			ksft_print_msg("read failed on proc[%d].pfd[0] error (%s)\n",
    			i, strerror(errno));
    	close(proc[i].pfd[0]);
    }
@@ -202,30 +202,29 @@ void disp_processes(int num_processes, struct child_args proc[])
 {
    int i, j;
-	printf("tid=%d, / tgid=%d / pgid=%d: %lx\n", gettid(), getpid(), getpgid(0),
+	ksft_print_msg("tid=%d, / tgid=%d / pgid=%d: %lx\n", gettid(), getpid(), getpgid(0),
           get_cs_cookie(getpid()));
for (i = 0; i < num_processes; ++i) {
-		printf("    tid=%d, / tgid=%d / pgid=%d: %lx\n", proc[i].cpid, proc[i].cpid,
+		ksft_print_msg("    tid=%d, / tgid=%d / pgid=%d: %lx\n", proc[i].cpid, proc[i].cpid,
    	       getpgid(proc[i].cpid), get_cs_cookie(proc[i].cpid));
    	for (j = 0; j < proc[i].num_threads; ++j) {
-			printf("        tid=%d, / tgid=%d / pgid=%d: %lx\n", proc[i].thr_tids[j],
+			ksft_print_msg("        tid=%d, / tgid=%d / pgid=%d: %lx\n", proc[i].thr_tids[j],
    		       proc[i].cpid, getpgid(0), get_cs_cookie(proc[i].thr_tids[j]));
    	}
    }
    puts("\n");
 }
-static int errors;
-
 #define validate(v) _validate(__LINE__, v, #v)
 void _validate(int line, int val, char *msg)
 {
    if (!val) {
-		++errors;
-		printf("(%d) FAILED: %s\n", line, msg);
+		ksft_print_msg("(%d) FAILED: %s\n", line, msg);
+		ksft_inc_fail_cnt();
    } else {
-		printf("(%d) PASSED: %s\n", line, msg);
+		ksft_print_msg("(%d) PASSED: %s\n", line, msg);
+		ksft_inc_pass_cnt();
    }
 }
@@ -254,13 +253,17 @@ int main(int argc, char *argv[])
    		keypress = 1;
    		break;
    	case 'h':
-			printf(USAGE);
+			ksft_print_msg(USAGE);
    		exit(EXIT_SUCCESS);
    	default:
    		handle_usage(20, "unknown option");
    	}
    }
+	if (!hyperthreading_enabled()) {
+		ksft_exit_skip("This test requires hyperthreading to be enabled\n");
+	}
+
    if (num_processes < 1 || num_processes > MAX_PROCESSES)
    	handle_usage(1, "Bad processes value");
@@ -272,17 +275,22 @@ int main(int argc, char *argv[])
srand(time(NULL));
-	/* put into separate process group */
+	/* Put into separate process group */
    if (setpgid(0, 0) != 0)
    	handle_error("process group");
-	printf("\n## Create a thread/process/process group hiearchy\n");
+	ksft_print_header();
+
+	/* Increase the count if adding more validate() statements. */
+	ksft_set_plan(17);
+
+	ksft_print_msg("\n## Create a thread/process/process group hiearchy\n");
    create_processes(num_processes, num_threads, procs);
    need_cleanup = 1;
    disp_processes(num_processes, procs);
    validate(get_cs_cookie(0) == 0);
-	printf("\n## Set a cookie on entire process group\n");
+	ksft_print_msg("\n## Set a cookie on entire process group\n");
    if (_prctl(PR_SCHED_CORE, PR_SCHED_CORE_CREATE, 0, PIDTYPE_PGID, 0) < 0)
    	handle_error("core_sched create failed -- PGID");
    disp_processes(num_processes, procs);
@@ -296,7 +304,7 @@ int main(int argc, char *argv[])
    validate(get_cs_cookie(0) == get_cs_cookie(pid));
    validate(get_cs_cookie(0) == get_cs_cookie(procs[pidx].thr_tids[0]));
-	printf("\n## Set a new cookie on entire process/TGID [%d]\n", pid);
+	ksft_print_msg("\n## Set a new cookie on entire process/TGID [%d]\n", pid);
    if (_prctl(PR_SCHED_CORE, PR_SCHED_CORE_CREATE, pid, PIDTYPE_TGID, 0) < 0)
    	handle_error("core_sched create failed -- TGID");
    disp_processes(num_processes, procs);
@@ -305,7 +313,7 @@ int main(int argc, char *argv[])
    validate(get_cs_cookie(pid) != 0);
    validate(get_cs_cookie(pid) == get_cs_cookie(procs[pidx].thr_tids[0]));
-	printf("\n## Copy the cookie of current/PGID[%d], to pid [%d] as PIDTYPE_PID\n",
+	ksft_print_msg("\n## Copy the cookie of current/PGID[%d], to pid [%d] as PIDTYPE_PID\n",
           getpid(), pid);
    if (_prctl(PR_SCHED_CORE, PR_SCHED_CORE_SHARE_TO, pid, PIDTYPE_PID, 0) < 0)
    	handle_error("core_sched share to itself failed -- PID");
@@ -315,7 +323,7 @@ int main(int argc, char *argv[])
    validate(get_cs_cookie(pid) != 0);
    validate(get_cs_cookie(pid) != get_cs_cookie(procs[pidx].thr_tids[0]));
-	printf("\n## Copy cookie from a thread [%d] to current/PGID [%d] as PIDTYPE_PID\n",
+	ksft_print_msg("\n## Copy cookie from a thread [%d] to current/PGID [%d] as PIDTYPE_PID\n",
           procs[pidx].thr_tids[0], getpid());
    if (_prctl(PR_SCHED_CORE, PR_SCHED_CORE_SHARE_FROM, procs[pidx].thr_tids[0],
    	   PIDTYPE_PID, 0) < 0)
@@ -325,7 +333,7 @@ int main(int argc, char *argv[])
    validate(get_cs_cookie(0) == get_cs_cookie(procs[pidx].thr_tids[0]));
    validate(get_cs_cookie(pid) != get_cs_cookie(procs[pidx].thr_tids[0]));
-	printf("\n## Copy cookie from current [%d] to current as pidtype PGID\n", getpid());
+	ksft_print_msg("\n## Copy cookie from current [%d] to current as pidtype PGID\n", getpid());
    if (_prctl(PR_SCHED_CORE, PR_SCHED_CORE_SHARE_TO, 0, PIDTYPE_PGID, 0) < 0)
    	handle_error("core_sched share to self failed -- PGID");
    disp_processes(num_processes, procs);
@@ -340,20 +348,16 @@ int main(int argc, char *argv[])
    validate(_prctl(PR_SCHED_CORE, PR_SCHED_CORE_SHARE_TO, 0, PIDTYPE_PGID, 1) < 0
    	&& errno == EINVAL);
-	if (errors) {
-		printf("TESTS FAILED. errors: %d\n", errors);
-		res = 10;
-	} else {
-		printf("SUCCESS !!!\n");
-	}
-
-	if (keypress)
+	if (keypress) {
+		ksft_print_msg("Waiting for keypress to exit\n");
    	getchar();
-	else
+	} else {
    	sleep(delay);
+	}
for (pidx = 0; pidx < num_processes; ++pidx)
    	kill(procs[pidx].cpid, 15);
+	ksft_finished();
    return res;
 }
-- 
2.34.1



    

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[PATCH 08/10] selftests/sched: Migrate cs_prctl_test to kselfttest