[LTP] [PATCH v4 03/10] Rewrite sem_comm.c using new LTP API
Andrea Cervesato
andrea.cervesato@suse.de
Fri Mar 25 13:54:38 CET 2022
Signed-off-by: Andrea Cervesato <andrea.cervesato@suse.de>
---
.../kernel/containers/sysvipc/sem_comm.c | 178 +++++-------------
1 file changed, 52 insertions(+), 126 deletions(-)
diff --git a/testcases/kernel/containers/sysvipc/sem_comm.c b/testcases/kernel/containers/sysvipc/sem_comm.c
index a2c354a08..de548d3ec 100644
--- a/testcases/kernel/containers/sysvipc/sem_comm.c
+++ b/testcases/kernel/containers/sysvipc/sem_comm.c
@@ -1,20 +1,16 @@
-/* Copyright (c) 2014 Red Hat, Inc.
- *
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of version 2 the GNU General Public License as
- * published by the Free Software Foundation.
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Copyright (c) 2014 Red Hat, Inc.
+ * Copyright (C) 2022 SUSE LLC Andrea Cervesato <andrea.cervesato@suse.com>
+ */
+
+/*\
+ * [Description]
*
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
+ * Test SysV IPC semaphore usage between cloned processes.
*
- * You should have received a copy of the GNU General Public License
- * along with this program. If not, see <http://www.gnu.org/licenses/>.
- ***********************************************************************
- * File: sem_comm.c
+ * [Algorithm]
*
- * Description:
* 1. Clones two child processes with CLONE_NEWIPC flag, each child
* creates System V semaphore (sem) with the _identical_ key.
* 2. Child1 locks the semaphore.
@@ -26,166 +22,96 @@
*/
#define _GNU_SOURCE
-#include <sys/ipc.h>
-#include <sys/types.h>
+
#include <sys/wait.h>
-#include <stdio.h>
-#include <errno.h>
-#include "ipcns_helper.h"
-#include "test.h"
-#include "safe_macros.h"
+#include <sys/msg.h>
+#include <sys/types.h>
+#include "tst_safe_sysv_ipc.h"
+#include "tst_test.h"
#include "lapi/sem.h"
+#include "common.h"
#define TESTKEY 124426L
-char *TCID = "sem_comm";
-int TST_TOTAL = 1;
-static void cleanup(void)
-{
- tst_rmdir();
-}
-
-static void setup(void)
-{
- tst_require_root();
- check_newipc();
- tst_tmpdir();
- TST_CHECKPOINT_INIT(tst_rmdir);
-}
-
-int chld1_sem(void *arg)
+static int chld1_sem(LTP_ATTRIBUTE_UNUSED void *arg)
{
int id;
union semun su;
struct sembuf sm;
- id = semget(TESTKEY, 1, IPC_CREAT);
- if (id == -1) {
- perror("semget");
- return 2;
- }
+ id = SAFE_SEMGET(TESTKEY, 1, IPC_CREAT);
su.val = 1;
- if (semctl(id, 0, SETVAL, su) == -1) {
- perror("semctl");
- semctl(id, 0, IPC_RMID);
- return 2;
- }
+ SAFE_SEMCTL(id, 0, SETVAL, su);
/* tell child2 to continue and wait for it to create the semaphore */
- TST_SAFE_CHECKPOINT_WAKE_AND_WAIT(NULL, 0);
+ TST_CHECKPOINT_WAKE_AND_WAIT(0);
sm.sem_num = 0;
sm.sem_op = -1;
sm.sem_flg = IPC_NOWAIT;
- if (semop(id, &sm, 1) == -1) {
- perror("semop");
- semctl(id, 0, IPC_RMID);
- return 2;
- }
+ SAFE_SEMOP(id, &sm, 1);
/* tell child2 to continue and wait for it to lock the semaphore */
- TST_SAFE_CHECKPOINT_WAKE_AND_WAIT(NULL, 0);
+ TST_CHECKPOINT_WAKE_AND_WAIT(0);
- sm.sem_op = 1;
- semop(id, &sm, 1);
+ SAFE_SEMCTL(id, 0, IPC_RMID);
- semctl(id, 0, IPC_RMID);
return 0;
}
-int chld2_sem(void *arg)
+static int chld2_sem(LTP_ATTRIBUTE_UNUSED void *arg)
{
- int id, rval = 0;
+ int id;
struct sembuf sm;
union semun su;
/* wait for child1 to create the semaphore */
- TST_SAFE_CHECKPOINT_WAIT(NULL, 0);
+ TST_CHECKPOINT_WAIT(0);
- id = semget(TESTKEY, 1, IPC_CREAT);
- if (id == -1) {
- perror("semget");
- return 2;
- }
+ id = SAFE_SEMGET(TESTKEY, 1, IPC_CREAT);
su.val = 1;
- if (semctl(id, 0, SETVAL, su) == -1) {
- perror("semctl");
- semctl(id, 0, IPC_RMID);
- return 2;
- }
+ SAFE_SEMCTL(id, 0, SETVAL, su);
/* tell child1 to continue and wait for it to lock the semaphore */
- TST_SAFE_CHECKPOINT_WAKE_AND_WAIT(NULL, 0);
+ TST_CHECKPOINT_WAKE_AND_WAIT(0);
sm.sem_num = 0;
sm.sem_op = -1;
sm.sem_flg = IPC_NOWAIT;
- if (semop(id, &sm, 1) == -1) {
- if (errno == EAGAIN) {
- rval = 1;
- } else {
- perror("semop");
- semctl(id, 0, IPC_RMID);
- return 2;
- }
+ TEST(semop(id, &sm, 1));
+ if (TST_RET < 0) {
+ if (TST_ERR != EAGAIN)
+ tst_brk(TBROK | TERRNO, "semop error");
+
+ tst_res(TFAIL, "semaphore decremented from different namespace");
+ } else {
+ tst_res(TPASS, "semaphore has not been decremented");
}
/* tell child1 to continue */
- TST_SAFE_CHECKPOINT_WAKE(NULL, 0);
+ TST_CHECKPOINT_WAKE(0);
- sm.sem_op = 1;
- semop(id, &sm, 1);
+ SAFE_SEMCTL(id, 0, IPC_RMID);
- semctl(id, 0, IPC_RMID);
- return rval;
+ return 0;
}
-static void test(void)
+static void run(void)
{
- int status, ret = 0;
-
- ret = do_clone_unshare_test(T_CLONE, CLONE_NEWIPC, chld1_sem, NULL);
- if (ret == -1)
- tst_brkm(TBROK | TERRNO, cleanup, "clone failed");
-
- ret = do_clone_unshare_test(T_CLONE, CLONE_NEWIPC, chld2_sem, NULL);
- if (ret == -1)
- tst_brkm(TBROK | TERRNO, cleanup, "clone failed");
-
-
- while (wait(&status) > 0) {
- if (WIFEXITED(status) && WEXITSTATUS(status) == 1)
- ret = 1;
- if (WIFEXITED(status) && WEXITSTATUS(status) == 2)
- tst_brkm(TBROK | TERRNO, cleanup, "error in child");
- if (WIFSIGNALED(status)) {
- tst_resm(TFAIL, "child was killed with signal %s",
- tst_strsig(WTERMSIG(status)));
- return;
- }
- }
-
- if (ret)
- tst_resm(TFAIL, "SysV sem: communication with identical keys"
- " between namespaces");
- else
- tst_resm(TPASS, "SysV sem: communication with identical keys"
- " between namespaces");
+ clone_unshare_test(T_CLONE, CLONE_NEWIPC, chld1_sem, NULL);
+ clone_unshare_test(T_CLONE, CLONE_NEWIPC, chld2_sem, NULL);
}
-int main(int argc, char *argv[])
+static void setup(void)
{
- int lc;
-
- tst_parse_opts(argc, argv, NULL, NULL);
-
- setup();
-
- for (lc = 0; TEST_LOOPING(lc); lc++)
- test();
-
- cleanup();
- tst_exit();
+ check_newipc();
}
+
+static struct tst_test test = {
+ .test_all = run,
+ .setup = setup,
+ .needs_root = 1,
+ .needs_checkpoints = 1,
+};
--
2.35.1
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