[LTP] [PATCH v6 4/6] Refactor mqns_04 using new LTP API
Andrea Cervesato
andrea.cervesato@suse.de
Tue Mar 7 13:47:06 CET 2023
From: Andrea Cervesato <andrea.cervesato@suse.com>
Signed-off-by: Andrea Cervesato <andrea.cervesato@suse.com>
---
runtest/containers | 4 +-
testcases/kernel/containers/mqns/mqns_04.c | 291 ++++++++++-----------
2 files changed, 139 insertions(+), 156 deletions(-)
diff --git a/runtest/containers b/runtest/containers
index 52cc65828..14ae96832 100644
--- a/runtest/containers
+++ b/runtest/containers
@@ -23,8 +23,8 @@ mqns_02_clone mqns_02 -m clone
mqns_02_unshare mqns_02 -m unshare
mqns_03_clone mqns_03 -m clone
mqns_03_unshare mqns_03 -m unshare
-mqns_04 mqns_04
-mqns_04_clone mqns_04 -clone
+mqns_04_clone mqns_04 -m clone
+mqns_04_unshare mqns_04 -m unshare
netns_netlink netns_netlink
netns_breakns_ip_ipv4_netlink netns_breakns.sh
diff --git a/testcases/kernel/containers/mqns/mqns_04.c b/testcases/kernel/containers/mqns/mqns_04.c
index d07a85c04..75c54259c 100644
--- a/testcases/kernel/containers/mqns/mqns_04.c
+++ b/testcases/kernel/containers/mqns/mqns_04.c
@@ -1,187 +1,170 @@
+// SPDX-License-Identifier: GPL-2.0
/*
-* Copyright (c) International Business Machines Corp., 2009
-* 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
-*
-* Author: Serge Hallyn <serue@us.ibm.com>
-*
-* Check mqueuefs lifetime
-* . parent creates /dev/mqueue2
-* . child mounts mqueue there
-* . child does mq_open("/ab")
-* . parent checks for /dev/mqueue2
-* . child exits
-* . parent checks for /dev/mqueue2
-* . parent tries 'touch /dev/mqueue2/dd' -> should fail
-* . parent umounts /dev/mqueue2
-
-***************************************************************************/
-
-#ifndef _GNU_SOURCE
-#define _GNU_SOURCE
-#endif
-#include <sys/types.h>
-#include <sys/stat.h>
+ * Copyright (c) International Business Machines Corp., 2009
+ * Copyright (c) Serge Hallyn <serue@us.ibm.com>
+ * Copyright (C) 2023 SUSE LLC Andrea Cervesato <andrea.cervesato@suse.com>
+ */
+
+/*\
+ * [Description]
+ *
+ * Test mqueuefs manipulation from child/parent namespaces.
+ *
+ * [Algorithm]
+ *
+ * - parent creates mqueue folder in <tmpdir>
+ * - child mounts mqueue there
+ * - child creates /MQ1 mqueue
+ * - parent checks for <tmpdir>/mqueue/MQ1 existence
+ * - child exits
+ * - parent checks for <tmpdir>/mqueue/MQ1 existence
+ * - parent tries 'touch <tmpdir>/mqueue/MQ2' -> should fail
+ * - parent umount mqueuefs
+ */
+
#include <sys/wait.h>
-#include <assert.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <unistd.h>
-#include <string.h>
-#include <errno.h>
-#include "mqns.h"
-#include "mqns_helper.h"
+#include "tst_test.h"
+#include "lapi/sched.h"
+#include "tst_safe_posix_ipc.h"
+#include "tst_safe_stdio.h"
-char *TCID = "posixmq_namespace_04";
-int TST_TOTAL = 1;
+#define CHECK_MQ_OPEN_RET(x) ((x) >= 0 || ((x) == -1 && errno != EMFILE))
-int p1[2];
-int p2[2];
+#define MQNAME1 "/MQ1"
+#define MQNAME2 "/MQ2"
-#define FNAM1 DEV_MQUEUE2 SLASH_MQ1
-#define FNAM2 DEV_MQUEUE2 SLASH_MQ2
+static char *str_op;
+static char *devdir;
+static char *mqueue1;
+static char *mqueue2;
+static int *mq_freed1;
+static int *mq_freed2;
-int check_mqueue(void *vtest)
+static void check_mqueue(void)
{
- char buf[30];
mqd_t mqd;
- int rc;
- (void) vtest;
+ tst_res(TINFO, "Creating %s mqueue from within child process", MQNAME1);
- close(p1[1]);
- close(p2[0]);
+ mqd = TST_RETRY_FUNC(
+ mq_open(MQNAME1, O_RDWR | O_CREAT | O_EXCL, 0755, NULL),
+ CHECK_MQ_OPEN_RET);
+ if (mqd == -1)
+ tst_brk(TBROK | TERRNO, "mq_open failed");
- read(p1[0], buf, 3); /* go */
+ SAFE_MQ_CLOSE(mqd);
+ tst_atomic_inc(mq_freed1);
- mqd = tst_syscall(__NR_mq_open, NOSLASH_MQ1, O_RDWR | O_CREAT | O_EXCL,
- 0755, NULL);
- if (mqd == -1) {
- write(p2[1], "mqfail", 7);
- tst_exit();
- }
+ tst_res(TINFO, "Mount %s from within child process", devdir);
+
+ SAFE_MOUNT("mqueue", devdir, "mqueue", 0, NULL);
+
+ TST_CHECKPOINT_WAKE_AND_WAIT(0);
+}
- mq_close(mqd);
+static void run(void)
+{
+ const struct tst_clone_args clone_args = { CLONE_NEWIPC, SIGCHLD };
+ struct stat statbuf;
- rc = mount("mqueue", DEV_MQUEUE2, "mqueue", 0, NULL);
- if (rc == -1) {
- perror("mount");
- write(p2[1], "mount", 6);
- tst_exit();
+ if (str_op && !strcmp(str_op, "clone")) {
+ tst_res(TINFO, "Spawning isolated process");
+
+ if (!SAFE_CLONE(&clone_args)) {
+ check_mqueue();
+ return;
+ }
+ } else if (str_op && !strcmp(str_op, "unshare")) {
+ tst_res(TINFO, "Spawning unshared process");
+
+ if (!SAFE_FORK()) {
+ SAFE_UNSHARE(CLONE_NEWIPC);
+ check_mqueue();
+ return;
+ }
}
- write(p2[1], "go", 3);
- read(p1[0], buf, 3);
+ TST_CHECKPOINT_WAIT(0);
- tst_exit();
-}
+ SAFE_STAT(mqueue1, &statbuf);
+ tst_res(TPASS, "%s child's mqueue can be accessed from parent", mqueue1);
-static void setup(void)
-{
- tst_require_root();
- check_mqns();
-}
+ TST_CHECKPOINT_WAKE(0);
-int main(int argc, char *argv[])
-{
- int rc;
- int status;
- char buf[30];
- struct stat statbuf;
- int use_clone = T_UNSHARE;
+ tst_res(TINFO, "Waiting child to exit");
- setup();
+ tst_reap_children();
+ tst_atomic_dec(mq_freed1);
- if (argc == 2 && strcmp(argv[1], "-clone") == 0) {
- tst_resm(TINFO,
- "Testing posix mq namespaces through clone(2).");
- use_clone = T_CLONE;
- } else
- tst_resm(TINFO,
- "Testing posix mq namespaces through unshare(2).");
+ SAFE_STAT(mqueue1, &statbuf);
+ tst_res(TPASS, "%s child's mqueue can be accessed from parent after child's dead", mqueue1);
- if (pipe(p1) == -1) {
- perror("pipe");
- exit(EXIT_FAILURE);
- }
- if (pipe(p2) == -1) {
- perror("pipe");
- exit(EXIT_FAILURE);
- }
+ tst_res(TINFO, "Try to create %s from parent", mqueue2);
- mkdir(DEV_MQUEUE2, 0755);
+ TST_EXP_FAIL(creat(mqueue2, 0755), EACCES);
+ if (!TST_PASS)
+ tst_atomic_inc(mq_freed2);
- tst_resm(TINFO, "Checking mqueue filesystem lifetime");
+ SAFE_UMOUNT(devdir);
+}
- /* fire off the test */
- rc = do_clone_unshare_test(use_clone, CLONE_NEWIPC, check_mqueue, NULL);
- if (rc < 0) {
- tst_resm(TFAIL, "failed clone/unshare");
- goto fail;
- }
+static void setup(void)
+{
+ char *tmpdir;
- close(p1[0]);
- close(p2[1]);
- write(p1[1], "go", 3);
-
- read(p2[0], buf, 7);
- if (!strcmp(buf, "mqfail")) {
- tst_resm(TFAIL, "child process could not create mqueue");
- goto fail;
- } else if (!strcmp(buf, "mount")) {
- tst_resm(TFAIL, "child process could not mount mqueue");
- goto fail;
- }
+ if (!str_op)
+ tst_brk(TCONF, "Please specify clone|unshare child isolation");
- rc = stat(FNAM1, &statbuf);
- if (rc == -1) {
- perror("stat");
- write(p1[1], "go", 3);
- tst_resm(TFAIL, "parent could not see child's created mq");
- goto fail;
- }
- write(p1[1], "go", 3);
+ tmpdir = tst_get_tmpdir();
- rc = wait(&status);
- if (rc == -1) {
- perror("wait");
- tst_resm(TFAIL, "error while parent waited on child to exit");
- goto fail;
- }
- if (!WIFEXITED(status)) {
- tst_resm(TFAIL, "Child did not exit normally (status %d)",
- status);
- goto fail;
- }
- rc = stat(FNAM1, &statbuf);
- if (rc == -1) {
- tst_resm(TFAIL,
- "parent's view of child's mq died with child");
- goto fail;
- }
+ SAFE_ASPRINTF(&devdir, "%s/mqueue", tmpdir);
+ SAFE_MKDIR(devdir, 0755);
- rc = creat(FNAM2, 0755);
- if (rc != -1) {
- tst_resm(TFAIL,
- "parent was able to create a file in dead child's mqfs");
- goto fail;
- }
+ SAFE_ASPRINTF(&mqueue1, "%s" MQNAME1, devdir);
+ SAFE_ASPRINTF(&mqueue2, "%s" MQNAME2, devdir);
+
+ mq_freed1 = SAFE_MMAP(NULL,
+ sizeof(int),
+ PROT_READ | PROT_WRITE,
+ MAP_SHARED | MAP_ANONYMOUS,
+ -1, 0);
- tst_resm(TPASS, "Child mqueue fs still visible for parent");
+ mq_freed2 = SAFE_MMAP(NULL,
+ sizeof(int),
+ PROT_READ | PROT_WRITE,
+ MAP_SHARED | MAP_ANONYMOUS,
+ -1, 0);
+}
-fail:
- umount(DEV_MQUEUE2);
- rmdir(DEV_MQUEUE2);
+static void cleanup(void)
+{
+ if (!devdir)
+ return;
- tst_exit();
+ if (tst_is_mounted(devdir))
+ SAFE_UMOUNT(devdir);
+
+ if (*mq_freed1)
+ SAFE_MQ_UNLINK(MQNAME1);
+
+ if (*mq_freed2)
+ SAFE_MQ_UNLINK(MQNAME2);
}
+
+static struct tst_test test = {
+ .test_all = run,
+ .setup = setup,
+ .cleanup = cleanup,
+ .needs_root = 1,
+ .forks_child = 1,
+ .needs_tmpdir = 1,
+ .needs_checkpoints = 1,
+ .options = (struct tst_option[]) {
+ { "m:", &str_op, "Child process isolation <clone|unshare>" },
+ {},
+ },
+ .needs_kconfigs = (const char *[]) {
+ "CONFIG_USER_NS",
+ NULL
+ },
+};
--
2.35.3
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