[LTP] [PATCH v4 08/10] Rewrite shm_comm.c using new LTP API

[Andrea Cervesato]

Signed-off-by: Andrea Cervesato <andrea.cervesato@suse.de>
---
 .../kernel/containers/sysvipc/shm_comm.c      | 167 ++++++------------
 1 file changed, 50 insertions(+), 117 deletions(-)

diff --git a/testcases/kernel/containers/sysvipc/shm_comm.c b/testcases/kernel/containers/sysvipc/shm_comm.c
index 4b3bbfaa8..12ad49110 100644
--- a/testcases/kernel/containers/sysvipc/shm_comm.c
+++ b/testcases/kernel/containers/sysvipc/shm_comm.c
@@ -1,20 +1,17 @@
-/* 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 if SysV IPC shared memory is properly working between two different
+ * namespaces.
  *
- * 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: shm_comm.c
+ * [Algorithm]
  *
- * Description:
  * 1. Clones two child processes with CLONE_NEWIPC flag, each child
  *    allocates System V shared memory segment (shm) with the _identical_
  *    key and attaches that segment into its address space.
@@ -27,141 +24,77 @@
  */
 
 #define _GNU_SOURCE
-#include <sys/ipc.h>
-#include <sys/shm.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/wait.h>
+#include <sys/msg.h>
+#include <sys/types.h>
+#include "tst_safe_sysv_ipc.h"
+#include "tst_test.h"
+#include "common.h"
 
 #define TESTKEY 124426L
 #define SHMSIZE 50
-char *TCID	= "shm_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_shm(void *arg)
+static int chld1_shm(LTP_ATTRIBUTE_UNUSED void *arg)
 {
-	int id, rval = 0;
+	int id;
 	char *shmem;
 
-	id = shmget(TESTKEY, SHMSIZE, IPC_CREAT);
-	if (id == -1) {
-		perror("shmget");
-		return 2;
-	}
-
-	if ((shmem = shmat(id, NULL, 0)) == (char *) -1) {
-		perror("shmat");
-		shmctl(id, IPC_RMID, NULL);
-		return 2;
-	}
+	id = SAFE_SHMGET(TESTKEY, SHMSIZE, IPC_CREAT);
 
+	shmem = SAFE_SHMAT(id, NULL, 0);
 	*shmem = 'A';
 
-	TST_SAFE_CHECKPOINT_WAKE_AND_WAIT(NULL, 0);
+	TST_CHECKPOINT_WAKE_AND_WAIT(0);
 
-	/* if child1 shared segment has changed (by child2) report fail */
 	if (*shmem != 'A')
-		rval = 1;
+		tst_res(TFAIL, "shared memory leak between namespaces");
+	else
+		tst_res(TPASS, "shared memory didn't leak between namespaces");
+
+	TST_CHECKPOINT_WAKE(0);
 
-	/* tell child2 to continue */
-	TST_SAFE_CHECKPOINT_WAKE(NULL, 0);
+	SAFE_SHMDT(shmem);
+	SAFE_SHMCTL(id, IPC_RMID, NULL);
 
-	shmdt(shmem);
-	shmctl(id, IPC_RMID, NULL);
-	return rval;
+	return 0;
 }
 
-int chld2_shm(void *arg)
+static int chld2_shm(LTP_ATTRIBUTE_UNUSED void *arg)
 {
 	int id;
 	char *shmem;
 
-	id = shmget(TESTKEY, SHMSIZE, IPC_CREAT);
-	if (id == -1) {
-		perror("shmget");
-		return 2;
-	}
+	id = SAFE_SHMGET(TESTKEY, SHMSIZE, IPC_CREAT);
 
-	if ((shmem = shmat(id, NULL, 0)) == (char *) -1) {
-		perror("shmat");
-		shmctl(id, IPC_RMID, NULL);
-		return 2;
-	}
+	shmem = SAFE_SHMAT(id, NULL, 0);
 
-	/* wait for child1 to write to his segment */
-	TST_SAFE_CHECKPOINT_WAIT(NULL, 0);
+	TST_CHECKPOINT_WAIT(0);
 
 	*shmem = 'B';
 
-	TST_SAFE_CHECKPOINT_WAKE_AND_WAIT(NULL, 0);
+	TST_CHECKPOINT_WAKE_AND_WAIT(0);
+
+	SAFE_SHMDT(shmem);
+	SAFE_SHMCTL(id, IPC_RMID, NULL);
 
-	shmdt(shmem);
-	shmctl(id, IPC_RMID, NULL);
 	return 0;
 }
 
-static void test(void)
+static void run(void)
 {
-	int status, ret = 0;
-
-	ret = do_clone_unshare_test(T_CLONE, CLONE_NEWIPC, chld1_shm, NULL);
-	if (ret == -1)
-		tst_brkm(TBROK | TERRNO, cleanup, "clone failed");
-
-	ret = do_clone_unshare_test(T_CLONE, CLONE_NEWIPC, chld2_shm, 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 shm: communication with identical keys"
-				" between namespaces");
-	else
-		tst_resm(TPASS, "SysV shm: communication with identical keys"
-				" between namespaces");
+	clone_unshare_test(T_CLONE, CLONE_NEWIPC, chld1_shm, NULL);
+	clone_unshare_test(T_CLONE, CLONE_NEWIPC, chld2_shm, 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