1 /*
2 * Copyright (c) International Business Machines Corp., 2009
3 * This program is free software; you can redistribute it and/or modify
4 * it under the terms of the GNU General Public License as published by
5 * the Free Software Foundation; either version 2 of the License, or
6 * (at your option) any later version.
7 *
8 * This program is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
11 * the GNU General Public License for more details.
12 * You should have received a copy of the GNU General Public License
13 * along with this program; if not, write to the Free Software
14 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
15 *
16 * Author: Serge Hallyn <serue@us.ibm.com>
17 *
18 * Check ipcns+sb longevity
19 *
20 * Mount mqueue fs
21 * unshare
22 * In unshared process:
23 * Create "/mq1" with mq_open()
24 * Mount mqueuefs
25 * Check that /mq1 exists
26 * Create /dev/mqueue/mq2 through vfs (create(2))
27 * Umount /dev/mqueue
28 * Remount /dev/mqueue
29 * Check that both /mq1 and /mq2 exist
30
31 ***************************************************************************/
32
33 #ifndef _GNU_SOURCE
34 #define _GNU_SOURCE
35 #endif
36 #include <sys/types.h>
37 #include <sys/stat.h>
38 #include <sys/wait.h>
39 #include <assert.h>
40 #include <stdio.h>
41 #include <stdlib.h>
42 #include <unistd.h>
43 #include <string.h>
44 #include <errno.h>
45 #include "mqns.h"
46 #include "mqns_helper.h"
47
48 char *TCID = "posixmq_namespace_03";
49 int TST_TOTAL = 1;
50
51 int p1[2];
52 int p2[2];
53
54 #define FNAM1 DEV_MQUEUE2 SLASH_MQ1
55 #define FNAM2 DEV_MQUEUE2 SLASH_MQ2
56
check_mqueue(void * vtest)57 int check_mqueue(void *vtest)
58 {
59 char buf[30];
60 mqd_t mqd;
61 int rc;
62 struct stat statbuf;
63
64 (void) vtest;
65
66 close(p1[1]);
67 close(p2[0]);
68
69 if (read(p1[0], buf, 3) != 3) { /* go */
70 perror("read failed");
71 exit(1);
72 }
73
74 mqd = ltp_syscall(__NR_mq_open, NOSLASH_MQ1, O_RDWR | O_CREAT | O_EXCL,
75 0755, NULL);
76 if (mqd == -1) {
77 write(p2[1], "mqfail", 7);
78 exit(1);
79 }
80
81 mq_close(mqd);
82
83 rc = mount("mqueue", DEV_MQUEUE2, "mqueue", 0, NULL);
84 if (rc == -1) {
85 write(p2[1], "mount1", 7);
86 exit(1);
87 }
88
89 rc = stat(FNAM1, &statbuf);
90 if (rc == -1) {
91 write(p2[1], "stat1", 6);
92 exit(1);
93 }
94
95 rc = creat(FNAM2, 0755);
96 if (rc == -1) {
97 write(p2[1], "creat", 6);
98 exit(1);
99 }
100
101 close(rc);
102
103 rc = umount(DEV_MQUEUE2);
104 if (rc == -1) {
105 write(p2[1], "umount", 7);
106 exit(1);
107 }
108
109 rc = mount("mqueue", DEV_MQUEUE2, "mqueue", 0, NULL);
110 if (rc == -1) {
111 write(p2[1], "mount2", 7);
112 exit(1);
113 }
114
115 rc = stat(FNAM1, &statbuf);
116 if (rc == -1) {
117 write(p2[1], "stat2", 7);
118 exit(1);
119 }
120
121 rc = stat(FNAM2, &statbuf);
122 if (rc == -1) {
123 write(p2[1], "stat3", 7);
124 exit(1);
125 }
126
127 write(p2[1], "done", 5);
128
129 exit(0);
130 }
131
setup(void)132 static void setup(void)
133 {
134 tst_require_root();
135 check_mqns();
136 }
137
main(int argc,char * argv[])138 int main(int argc, char *argv[])
139 {
140 int r;
141 char buf[30];
142 int use_clone = T_UNSHARE;
143
144 setup();
145
146 if (argc == 2 && strcmp(argv[1], "-clone") == 0) {
147 tst_resm(TINFO, "Testing posix mq namespaces through clone(2)");
148 use_clone = T_CLONE;
149 } else
150 tst_resm(TINFO,
151 "Testing posix mq namespaces through unshare(2)");
152
153 if (pipe(p1) == -1 || pipe(p2) == -1)
154 tst_brkm(TBROK | TERRNO, NULL, "pipe failed");
155
156 /* fire off the test */
157 r = do_clone_unshare_test(use_clone, CLONE_NEWIPC, check_mqueue, NULL);
158 if (r < 0) {
159 tst_brkm(TBROK | TERRNO, NULL, "failed clone/unshare");
160 }
161
162 tst_resm(TINFO, "Checking correct umount+remount of mqueuefs");
163
164 mkdir(DEV_MQUEUE2, 0755);
165
166 close(p1[0]);
167 close(p2[1]);
168 write(p1[1], "go", 3);
169
170 read(p2[0], buf, 7);
171 r = TFAIL;
172 if (!strcmp(buf, "mqfail")) {
173 tst_resm(TFAIL, "child process could not create mqueue");
174 goto fail;
175 } else if (!strcmp(buf, "mount1")) {
176 tst_resm(TFAIL, "child process could not mount mqueue");
177 goto fail;
178 } else if (!strcmp(buf, "stat1x")) {
179 tst_resm(TFAIL, "mq created by child is not in mqueuefs");
180 goto fail;
181 } else if (!strcmp(buf, "creat")) {
182 tst_resm(TFAIL, "child couldn't creat mq through mqueuefs");
183 goto fail;
184 } else if (!strcmp(buf, "umount")) {
185 tst_resm(TFAIL, "child couldn't umount mqueuefs");
186 goto fail;
187 } else if (!strcmp(buf, "mount2")) {
188 tst_resm(TFAIL, "child couldn't remount mqueuefs");
189 goto fail;
190 } else if (!strcmp(buf, "stat2")) {
191 tst_resm(TFAIL,
192 "mq_open()d file gone after remount of mqueuefs");
193 goto fail;
194 } else if (!strcmp(buf, "stat3")) {
195 tst_resm(TFAIL,
196 "creat(2)'d file gone after remount of mqueuefs");
197 goto fail;
198 }
199
200 tst_resm(TPASS, "umount+remount of mqueuefs remounted the right fs");
201
202 r = 0;
203 fail:
204 umount(DEV_MQUEUE2);
205 rmdir(DEV_MQUEUE2);
206 tst_exit();
207 }
208