[LTP] [PATCH v2] Refactor pidns16 test using new LTP API
Andrea Cervesato
andrea.cervesato@suse.com
Tue Aug 16 10:08:36 CEST 2022
Signed-off-by: Andrea Cervesato <andrea.cervesato@suse.com>
---
testcases/kernel/containers/pidns/pidns16.c | 197 +++++++-------------
1 file changed, 68 insertions(+), 129 deletions(-)
diff --git a/testcases/kernel/containers/pidns/pidns16.c b/testcases/kernel/containers/pidns/pidns16.c
index 2ee61065a..d11e8eaa1 100644
--- a/testcases/kernel/containers/pidns/pidns16.c
+++ b/testcases/kernel/containers/pidns/pidns16.c
@@ -1,157 +1,96 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
/*
-* Copyright (c) International Business Machines Corp., 2007
-* This program is free software; you can redistribute it and/or modify
-* it under the terms of the GNU General Public License as published by
-* the Free Software Foundation; either version 2 of the License, or
-* (at your option) any later version.
-* 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.
-* You should have received a copy of the GNU General Public License
-* along with this program; if not, write to the Free Software
-* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
-*
-***************************************************************************
-
-* * Test Assertion.
-* *----------------
-* * kill -USR1 container_init
-* * - from the parent process and also inside a container
-* * - Where init has defined a custom handler for USR1
-* * - Should call the handler and
-* * - Verify whether the signal handler is called from the proper process.
-* *
-* * Description:
-* * Create PID namespace container.
-* * Container init defines the handler for SIGUSR1 and waits indefinetly.
-* * Parent sends SIGUSR1 to container init.
-* * The signal handler is handled and the cont-init resumes normally.
-* * From the container, again the signal SIGUSR1 is sent.
-* * In the sig-handler check if it's invoked from correct pid(parent/container)
-* * If cont-init wakes up properly -
-* * it will return expected value at exit which is verified at the end.
-* *
-* * History:
-* * DATE NAME DESCRIPTION
-* * 04/11/08 Veerendra C <vechandr@in.ibm.com> Verifying cont init kill -USR1
-*
-*******************************************************************************/
-#include "config.h"
+ * Copyright (c) International Business Machines Corp., 2007
+ * 04/11/08 Veerendra C <vechandr@in.ibm.com>
+ * Copyright (C) 2022 SUSE LLC Andrea Cervesato <andrea.cervesato@suse.com>
+ */
+
+/*\
+ * [Description]
+ *
+ * Clone a process with CLONE_NEWPID flag and verifies that siginfo->si_pid is
+ * set to 0 if sender (parent process) sent the signal. Then send signal from
+ * container itself and check if siginfo->si_pid is set to 1.
+ */
#define _GNU_SOURCE 1
-#include <stdio.h>
-#include <stdlib.h>
-#include <sys/wait.h>
-#include <sys/types.h>
#include <signal.h>
-#include <unistd.h>
-#include "pidns_helper.h"
-#include "test.h"
-
-#define CHILD_PID 1
-#define PARENT_PID 0
+#include "tst_test.h"
+#include "lapi/namespaces_constants.h"
-char *TCID = "pidns16";
-int TST_TOTAL = 3;
+static volatile int exp_pid;
+static volatile int passed;
-void child_signal_handler(int sig, siginfo_t * si, void *unused)
+static void child_signal_handler(LTP_ATTRIBUTE_UNUSED int sig, siginfo_t *si, LTP_ATTRIBUTE_UNUSED void *unused)
{
- static int c = 1;
- pid_t expected_pid;
-
- /* Verifying from which process the signal handler is signalled */
-
- switch (c) {
- case 1:
- expected_pid = PARENT_PID;
- break;
- case 2:
- expected_pid = CHILD_PID;
- break;
- default:
- tst_resm(TBROK, "child should NOT be signalled 3+ times");
- return;
- }
+ tst_res(TINFO, "Received signal %s from PID %d", tst_strsig(si->si_signo), si->si_pid);
- if (si->si_pid == expected_pid)
- tst_resm(TPASS, "child is signalled from expected pid %d",
- expected_pid);
- else
- tst_resm(TFAIL, "child is signalled from unexpected pid %d,"
- " expecting pid %d", si->si_pid, expected_pid);
+ if (si->si_signo != SIGUSR1)
+ return;
- c++;
+ if (si->si_pid == exp_pid)
+ passed = 1;
}
-/*
- * child_fn() - Inside container
- */
-int child_fn(void *ttype)
+static int child_func(LTP_ATTRIBUTE_UNUSED void *arg)
{
struct sigaction sa;
- pid_t pid, ppid;
+ pid_t cpid, ppid;
- /* Set process id and parent pid */
- pid = getpid();
+ cpid = getpid();
ppid = getppid();
- if ((pid != CHILD_PID) || (ppid != PARENT_PID))
- tst_resm(TBROK, "pidns is not created.");
+ if (cpid != 1 || ppid != 0) {
+ tst_res(TFAIL, "Got unexpected result of cpid=%d ppid=%d", cpid, ppid);
+ return 1;
+ }
- /* Set signal handler for SIGUSR1, also mask other signals */
sa.sa_flags = SA_SIGINFO;
- sigemptyset(&sa.sa_mask);
+ SAFE_SIGFILLSET(&sa.sa_mask);
sa.sa_sigaction = child_signal_handler;
- if (sigaction(SIGUSR1, &sa, NULL) == -1)
- tst_resm(TBROK, "%d: sigaction() failed", pid);
-
- pause();
- tst_resm(TINFO, "Container: Resumed after receiving SIGUSR1 "
- "from parentNS ");
- if (kill(pid, SIGUSR1) != 0) {
- tst_resm(TFAIL, "kill(SIGUSR1) fails.");
- }
- tst_resm(TINFO, "Container: Resumed after sending SIGUSR1 "
- "from container itself");
- _exit(10);
-}
-static void setup(void)
-{
- tst_require_root();
- check_newpid();
-}
+ SAFE_SIGACTION(SIGUSR1, &sa, NULL);
-/***********************************************************************
-* M A I N
-***********************************************************************/
-int main()
-{
- int status;
- pid_t cpid;
+ passed = 0;
+ exp_pid = 0;
- setup();
+ TST_CHECKPOINT_WAKE_AND_WAIT(0);
- cpid = ltp_clone_quick(CLONE_NEWPID | SIGCHLD, child_fn, NULL);
+ if (passed)
+ tst_res(TPASS, "Container resumed after receiving SIGUSR1 from parent namespace");
+ else
+ tst_res(TFAIL, "Container did not receive the SIGUSR1 signal from parent");
- if (cpid < 0) {
- tst_resm(TBROK, "clone() failed.");
- }
+ passed = 0;
+ exp_pid = 1;
- sleep(1);
- if (kill(cpid, SIGUSR1) != 0) {
- tst_resm(TFAIL, "kill(SIGUSR1) fails.");
- }
- sleep(1);
- if (waitpid(cpid, &status, 0) < 0)
- tst_resm(TWARN, "waitpid() failed.");
+ SAFE_KILL(cpid, SIGUSR1);
- if ((WIFEXITED(status)) && (WEXITSTATUS(status) == 10))
- tst_resm(TPASS, "container init continued successfuly, "
- "after handling signal -USR1");
+ if (passed)
+ tst_res(TPASS, "Container resumed after receiving SIGUSR1 from container namespace");
else
- tst_resm(TFAIL, "c-init failed to continue after "
- "passing kill -USR1");
- tst_exit();
+ tst_res(TFAIL, "Container did not receive the SIGUSR1 signal from container");
+
+ return 0;
+}
+
+static void run(void)
+{
+ int ret;
+
+ ret = ltp_clone_quick(CLONE_NEWPID | SIGCHLD, child_func, NULL);
+ if (ret < 0)
+ tst_brk(TBROK | TERRNO, "clone failed");
+
+ TST_CHECKPOINT_WAIT(0);
+
+ SAFE_KILL(ret, SIGUSR1);
+
+ TST_CHECKPOINT_WAKE(0);
}
+
+static struct tst_test test = {
+ .test_all = run,
+ .needs_root = 1,
+ .needs_checkpoints = 1,
+};
--
2.35.3
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