[LTP] [PATCH v8 1/4] Refactor mqns_03 using new LTP API
Andrea Cervesato
andrea.cervesato@suse.de
Wed Jul 5 16:12:20 CEST 2023
From: Andrea Cervesato <andrea.cervesato@suse.com>
Signed-off-by: Andrea Cervesato <andrea.cervesato@suse.com>
---
Use a single mq_freed volatile variable to know mqueues status
Better parameters handling
Check and umount mqueue(s)
testcases/kernel/containers/mqns/mqns_03.c | 317 +++++++++------------
1 file changed, 140 insertions(+), 177 deletions(-)
diff --git a/testcases/kernel/containers/mqns/mqns_03.c b/testcases/kernel/containers/mqns/mqns_03.c
index a7452b970..ff7571880 100644
--- a/testcases/kernel/containers/mqns/mqns_03.c
+++ b/testcases/kernel/containers/mqns/mqns_03.c
@@ -1,207 +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 ipcns+sb longevity
-*
-* Mount mqueue fs
-* unshare
-* In unshared process:
-* Create "/mq1" with mq_open()
-* Mount mqueuefs
-* Check that /mq1 exists
-* Create /dev/mqueue/mq2 through vfs (create(2))
-* Umount /dev/mqueue
-* Remount /dev/mqueue
-* Check that both /mq1 and /mq2 exist
-
-***************************************************************************/
-
-#ifndef _GNU_SOURCE
-#define _GNU_SOURCE
-#endif
-#include <sys/types.h>
-#include <sys/stat.h>
-#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"
-
-char *TCID = "posixmq_namespace_03";
-int TST_TOTAL = 1;
-
-int p1[2];
-int p2[2];
-
-#define FNAM1 DEV_MQUEUE2 SLASH_MQ1
-#define FNAM2 DEV_MQUEUE2 SLASH_MQ2
-
-int check_mqueue(void *vtest)
+ * 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 from an isolated/forked process namespace.
+ *
+ * [Algorithm]
+ *
+ * - create /MQ1
+ * - mount mqueue inside the temporary folder
+ * - check for /MQ1 existance
+ * - create /MQ2 inside the temporary folder
+ * - umount
+ * - mount mqueue inside the temporary folder
+ * - check /MQ1 existance
+ * - check /MQ2 existance
+ * - umount
+ */
+
+#include "tst_test.h"
+#include "lapi/sched.h"
+#include "tst_safe_posix_ipc.h"
+#include "tst_safe_stdio.h"
+#include "tst_safe_macros.h"
+
+#define CHECK_MQ_OPEN_RET(x) ((x) >= 0 || ((x) == -1 && errno != EMFILE))
+
+#define MQNAME1 "/MQ1"
+#define MQNAME2 "/MQ2"
+
+static char *str_op;
+static char *devdir;
+static char *mqueue1;
+static char *mqueue2;
+static volatile int *mq_freed;
+
+static void check_mqueue(void)
{
- char buf[30];
- mqd_t mqd;
int rc;
+ mqd_t mqd;
struct stat statbuf;
- (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, 0777, NULL),
+ CHECK_MQ_OPEN_RET);
+ if (mqd == -1)
+ tst_brk(TBROK | TERRNO, "mq_open failed");
- if (read(p1[0], buf, 3) != 3) { /* go */
- perror("read failed");
- exit(1);
- }
+ SAFE_MQ_CLOSE(mqd);
+ mq_freed[0] = 1;
- mqd = tst_syscall(__NR_mq_open, NOSLASH_MQ1, O_RDWR | O_CREAT | O_EXCL,
- 0755, NULL);
- if (mqd == -1) {
- write(p2[1], "mqfail", 7);
- exit(1);
- }
+ tst_res(TINFO, "Mount %s from within child process", devdir);
- mq_close(mqd);
+ SAFE_MOUNT("mqueue", devdir, "mqueue", 0, NULL);
- rc = mount("mqueue", DEV_MQUEUE2, "mqueue", 0, NULL);
- if (rc == -1) {
- write(p2[1], "mount1", 7);
- exit(1);
- }
+ SAFE_STAT(mqueue1, &statbuf);
+ tst_res(TPASS, "%s exists at first mount", mqueue1);
- rc = stat(FNAM1, &statbuf);
- if (rc == -1) {
- write(p2[1], "stat1", 6);
- exit(1);
- }
+ tst_res(TINFO, "Creating %s from within child process", mqueue2);
- rc = creat(FNAM2, 0755);
- if (rc == -1) {
- write(p2[1], "creat", 6);
- exit(1);
- }
+ rc = SAFE_CREAT(mqueue2, 0755);
+ SAFE_CLOSE(rc);
+ mq_freed[1] = 1;
- close(rc);
+ tst_res(TINFO, "Mount %s from within child process a second time", devdir);
- rc = umount(DEV_MQUEUE2);
- if (rc == -1) {
- write(p2[1], "umount", 7);
- exit(1);
- }
+ SAFE_UMOUNT(devdir);
+ SAFE_MOUNT("mqueue", devdir, "mqueue", 0, NULL);
- rc = mount("mqueue", DEV_MQUEUE2, "mqueue", 0, NULL);
- if (rc == -1) {
- write(p2[1], "mount2", 7);
- exit(1);
- }
+ SAFE_STAT(mqueue1, &statbuf);
+ tst_res(TPASS, "%s exists at second mount", mqueue1);
- rc = stat(FNAM1, &statbuf);
- if (rc == -1) {
- write(p2[1], "stat2", 7);
- exit(1);
- }
+ SAFE_STAT(mqueue2, &statbuf);
+ tst_res(TPASS, "%s exists at second mount", mqueue2);
- rc = stat(FNAM2, &statbuf);
- if (rc == -1) {
- write(p2[1], "stat3", 7);
- exit(1);
- }
+ SAFE_UMOUNT(devdir);
+
+ SAFE_MQ_UNLINK(MQNAME1);
+ mq_freed[0] = 0;
- write(p2[1], "done", 5);
+ SAFE_MQ_UNLINK(MQNAME2);
+ mq_freed[1] = 0;
+}
- exit(0);
+static void run(void)
+{
+ const struct tst_clone_args clone_args = { CLONE_NEWIPC, SIGCHLD };
+
+ 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;
+ }
+ }
}
static void setup(void)
{
- tst_require_root();
- check_mqns();
+ char *tmpdir;
+
+ if (!str_op || (strcmp(str_op, "clone") && strcmp(str_op, "unshare")))
+ tst_brk(TCONF, "Please specify clone|unshare child isolation");
+
+ tmpdir = tst_get_tmpdir();
+
+ SAFE_ASPRINTF(&devdir, "%s/mqueue", tmpdir);
+ SAFE_MKDIR(devdir, 0755);
+
+ SAFE_ASPRINTF(&mqueue1, "%s" MQNAME1, devdir);
+ SAFE_ASPRINTF(&mqueue2, "%s" MQNAME2, devdir);
+
+ mq_freed = SAFE_MMAP(NULL,
+ 2 * sizeof(int),
+ PROT_READ | PROT_WRITE,
+ MAP_SHARED | MAP_ANONYMOUS,
+ -1, 0);
}
-int main(int argc, char *argv[])
+static void cleanup(void)
{
- int r;
- char buf[30];
- int use_clone = T_UNSHARE;
-
- setup();
-
- 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)");
-
- if (pipe(p1) == -1 || pipe(p2) == -1)
- tst_brkm(TBROK | TERRNO, NULL, "pipe failed");
-
- /* fire off the test */
- r = do_clone_unshare_test(use_clone, CLONE_NEWIPC, check_mqueue, NULL);
- if (r < 0) {
- tst_brkm(TBROK | TERRNO, NULL, "failed clone/unshare");
- }
+ if (!devdir)
+ return;
- tst_resm(TINFO, "Checking correct umount+remount of mqueuefs");
-
- mkdir(DEV_MQUEUE2, 0755);
-
- close(p1[0]);
- close(p2[1]);
- write(p1[1], "go", 3);
-
- read(p2[0], buf, 7);
- r = TFAIL;
- if (!strcmp(buf, "mqfail")) {
- tst_resm(TFAIL, "child process could not create mqueue");
- goto fail;
- } else if (!strcmp(buf, "mount1")) {
- tst_resm(TFAIL, "child process could not mount mqueue");
- goto fail;
- } else if (!strcmp(buf, "stat1x")) {
- tst_resm(TFAIL, "mq created by child is not in mqueuefs");
- goto fail;
- } else if (!strcmp(buf, "creat")) {
- tst_resm(TFAIL, "child couldn't creat mq through mqueuefs");
- goto fail;
- } else if (!strcmp(buf, "umount")) {
- tst_resm(TFAIL, "child couldn't umount mqueuefs");
- goto fail;
- } else if (!strcmp(buf, "mount2")) {
- tst_resm(TFAIL, "child couldn't remount mqueuefs");
- goto fail;
- } else if (!strcmp(buf, "stat2")) {
- tst_resm(TFAIL,
- "mq_open()d file gone after remount of mqueuefs");
- goto fail;
- } else if (!strcmp(buf, "stat3")) {
- tst_resm(TFAIL,
- "creat(2)'d file gone after remount of mqueuefs");
- goto fail;
- }
+ if (!access(mqueue1, F_OK))
+ SAFE_MQ_UNLINK(MQNAME1);
+
+ if (!access(mqueue2, F_OK))
+ SAFE_MQ_UNLINK(MQNAME2);
- tst_resm(TPASS, "umount+remount of mqueuefs remounted the right fs");
+ if (tst_is_mounted(devdir))
+ SAFE_UMOUNT(devdir);
- r = 0;
-fail:
- umount(DEV_MQUEUE2);
- rmdir(DEV_MQUEUE2);
- tst_exit();
+ if (*mq_freed)
+ SAFE_MUNMAP((void *)mq_freed, 2 * sizeof(int));
}
+
+static struct tst_test test = {
+ .test_all = run,
+ .setup = setup,
+ .cleanup = cleanup,
+ .needs_root = 1,
+ .forks_child = 1,
+ .needs_tmpdir = 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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