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Message-ID: <20081217175807.GE23331@us.ibm.com>
Date: Wed, 17 Dec 2008 11:58:07 -0600
From: "Serge E. Hallyn" <serue@...ibm.com>
To: lkml <linux-kernel@...r.kernel.org>
Cc: Linux Containers <containers@...ts.osdl.org>,
Subrata Modak1 <subrata.modak@...ibm.com>
Subject: [LTP PATCH 3/4] posix mqns: test vfs and mq interaction
Test that the interaction between mqueuefs and ipc namespaces
is correct (one mqueuefs for each ipc namespace, living at least
as long as the namespace)
Signed-off-by: Serge Hallyn <serue@...ibm.com>
---
testcases/kernel/containers/mqns/mqns.h | 1 +
testcases/kernel/containers/mqns/mqns_03.c | 196 +++++++++++++++++++++++
testcases/kernel/containers/mqns/runmqnstest.sh | 2 +-
3 files changed, 198 insertions(+), 1 deletions(-)
create mode 100644 testcases/kernel/containers/mqns/mqns_03.c
diff --git a/testcases/kernel/containers/mqns/mqns.h b/testcases/kernel/containers/mqns/mqns.h
index df8fc4b..4bf1e1f 100644
--- a/testcases/kernel/containers/mqns/mqns.h
+++ b/testcases/kernel/containers/mqns/mqns.h
@@ -9,5 +9,6 @@
#define DEV_MQUEUE "/dev/mqueue"
#define SLASH_MQ1 "/MQ1"
+#define SLASH_MQ2 "/MQ2"
#endif /* __MQNS_H */
diff --git a/testcases/kernel/containers/mqns/mqns_03.c b/testcases/kernel/containers/mqns/mqns_03.c
new file mode 100644
index 0000000..732bf88
--- /dev/null
+++ b/testcases/kernel/containers/mqns/mqns_03.c
@@ -0,0 +1,196 @@
+/*
+* 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+*
+* Author: Serge Hallyn <serue@...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
+
+***************************************************************************/
+
+#define _GNU_SOURCE 1
+#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"
+
+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)
+{
+ char buf[30];
+ mqd_t mqd;
+ int rc;
+ struct stat statbuf;
+
+ close(p1[1]);
+ close(p2[0]);
+
+ read(p1[0], buf, 3); /* go */
+
+ mqd = mq_open(SLASH_MQ1, O_RDWR|O_CREAT|O_EXCL, 0755, NULL);
+ if (mqd == -1) {
+ write(p2[1], "mqfail", 7);
+ tst_exit(3);
+ }
+
+ mq_close(mqd);
+
+ rc = mount("mqueue", DEV_MQUEUE2, "mqueue", 0, NULL);
+ if (rc == -1) {
+ perror("mount");
+ write(p2[1], "mount1", 7);
+ tst_exit(3);
+ }
+
+ rc = stat(FNAM1, &statbuf);
+ if (rc == -1) {
+ write(p2[1], "stat1", 6);
+ tst_exit(3);
+ }
+
+ rc = creat(FNAM2, 0755);
+ if (rc == -1) {
+ write(p2[1], "creat", 6);
+ tst_exit(3);
+ }
+
+ close(rc);
+
+ rc = umount(DEV_MQUEUE2);
+ if (rc == -1) {
+ perror("umount");
+ write(p2[1], "umount", 7);
+ tst_exit(3);
+ }
+
+ rc = mount("mqueue", DEV_MQUEUE2, "mqueue", 0, NULL);
+ if (rc == -1) {
+ write(p2[1], "mount2", 7);
+ tst_exit(3);
+ }
+
+ rc = stat(FNAM1, &statbuf);
+ if (rc == -1) {
+ write(p2[1], "stat2", 7);
+ tst_exit(3);
+ }
+
+ rc = stat(FNAM2, &statbuf);
+ if (rc == -1) {
+ write(p2[1], "stat3", 7);
+ tst_exit(3);
+ }
+
+ write(p2[1], "done", 5);
+
+ tst_exit(0);
+
+ /* NOT REACHED */
+ return 0;
+}
+
+
+int main(int argc, char *argv[])
+{
+ int r;
+ char buf[7];
+ int use_clone = T_UNSHARE;
+
+ if (argc == 2 && strcmp(argv[1], "-clone") == 0) {
+ tst_resm(TINFO, "Testing posix mq namespaces through clone(2).\n");
+ use_clone = T_CLONE;
+ } else
+ tst_resm(TINFO, "Testing posix mq namespaces through unshare(2).\n");
+
+ if (pipe(p1) == -1) { perror("pipe"); exit(EXIT_FAILURE); }
+ if (pipe(p2) == -1) { perror("pipe"); exit(EXIT_FAILURE); }
+
+ /* fire off the test */
+ r = do_clone_unshare_test(use_clone, CLONE_NEWIPC, check_mqueue, NULL);
+ if (r < 0) {
+ tst_resm(TFAIL, "failed clone/unshare\n");
+ tst_exit(1);
+ }
+
+ tst_resm(TINFO, "Checking correct umount+remount of mqueuefs\n");
+
+ mkdir(DEV_MQUEUE2, 0755);
+
+ close(p1[0]);
+ 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\n");
+ goto fail;
+ } else if (!strcmp(buf, "mount1")) {
+ tst_resm(TFAIL, "child process could not mount mqueue\n");
+ goto fail;
+ } else if (!strcmp(buf, "stat1x")) {
+ tst_resm(TFAIL, "mq created by child is not in mqueuefs\n");
+ goto fail;
+ } else if (!strcmp(buf, "creat")) {
+ tst_resm(TFAIL, "child couldn't creat mq through mqueuefs\n");
+ goto fail;
+ } else if (!strcmp(buf, "umount")) {
+ tst_resm(TFAIL, "child couldn't umount mqueuefs\n");
+ goto fail;
+ } else if (!strcmp(buf, "mount2")) {
+ tst_resm(TFAIL, "child couldn't remount mqueuefs\n");
+ goto fail;
+ } else if (!strcmp(buf, "stat2")) {
+ tst_resm(TFAIL, "mq_open()d file gone after remount of mqueuefs\n");
+ goto fail;
+ } else if (!strcmp(buf, "stat3")) {
+ tst_resm(TFAIL, "creat(2)'d file gone after remount of mqueuefs\n");
+ goto fail;
+ }
+
+ tst_resm(TPASS, "umount+remount of mqueuefs remounted the right fs\n");
+
+ r = 0;
+fail:
+ umount(DEV_MQUEUE2);
+ rmdir(DEV_MQUEUE2);
+ tst_exit(r);
+
+ /* NOT REACHED */
+ return 0;
+}
diff --git a/testcases/kernel/containers/mqns/runmqnstest.sh b/testcases/kernel/containers/mqns/runmqnstest.sh
index a5bbd24..b518d28 100755
--- a/testcases/kernel/containers/mqns/runmqnstest.sh
+++ b/testcases/kernel/containers/mqns/runmqnstest.sh
@@ -20,7 +20,7 @@
################################################################################
exit_code=0
-tests_list='mqns_01 mqns_02'
+tests_list='mqns_01 mqns_02 mqns_03'
for t in $tests_list
do
--
1.6.0.5
--
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