1 /*
2 * Copyright (c) International Business Machines Corp., 2009
3 * Copyright (c) Nadia Derbey, 2009
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation; either version 2 of the License, or
7 * (at your option) any later version.
8 *
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
12 * the GNU General Public License for more details.
13 * You should have received a copy of the GNU General Public License
14 * along with this program; if not, write to the Free Software
15 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
16 *
17 * Author: Nadia Derbey <Nadia.Derbey@bull.net>
18 *
19 * Check mqns isolation: child mqns cannot be accessed from father
20 *
21 * Mount mqueue fs
22 * unshare
23 * In unshared process:
24 * Mount newinstance mqueuefs
25 * Create a posix mq -->mq1
26 * Check that mq1 is not readable from father
27 *
28 * Changelog:
29 * Dec 16: accomodate new mqns semantics (Serge Hallyn)
30
31 ***************************************************************************/
32
33 #ifndef _GNU_SOURCE
34 #define _GNU_SOURCE
35 #endif
36 #include <sys/wait.h>
37 #include <errno.h>
38 #include <stdio.h>
39 #include <stdlib.h>
40 #include <string.h>
41 #include <unistd.h>
42 #include "mqns.h"
43 #include "mqns_helper.h"
44
45 char *TCID = "posixmq_namespace_02";
46 int TST_TOTAL = 1;
47
48 int p1[2];
49 int p2[2];
50
check_mqueue(void * vtest)51 int check_mqueue(void *vtest)
52 {
53 char buf[30];
54 mqd_t mqd;
55
56 (void) vtest;
57
58 close(p1[1]);
59 close(p2[0]);
60
61 if (read(p1[0], buf, 3) < 0) {
62 perror("read(p1[0], ..) failed");
63 exit(1);
64 } else {
65
66 mqd =
67 ltp_syscall(__NR_mq_open, NOSLASH_MQ1,
68 O_RDWR | O_CREAT | O_EXCL, 0777, NULL);
69 if (mqd == -1) {
70 if (write(p2[1], "mqfail", strlen("mqfail") + 1) < 0) {
71 perror("write(p2[1], \"mqfail\", ..) failed");
72 exit(1);
73 }
74 } else {
75
76 if (write(p2[1], "mqopen", strlen("mqopen") + 1) < 0) {
77 perror("write(p2[1], \"mqopen\", ..) failed");
78 exit(1);
79 } else {
80
81 if (read(p1[0], buf, 5) < 0) {
82 perror("read(p1[0], ..) failed");
83 exit(1);
84 } else {
85
86 /* destroy the mqueue */
87 if (mq_close(mqd) < 0) {
88 perror("mq_close(mqd) failed");
89 exit(1);
90 } else if (ltp_syscall(__NR_mq_unlink,
91 NOSLASH_MQ1) < 0) {
92 perror("mq_unlink(" NOSLASH_MQ1
93 ") failed");
94 exit(1);
95 } else if (write(p2[1], "done",
96 strlen("done") + 1)
97 < 0) {
98 perror("write(p2[1], "
99 "\"done\", ..) failed");
100 exit(1);
101 }
102
103 }
104
105 }
106
107 }
108
109 }
110 exit(0);
111
112 }
113
setup(void)114 static void setup(void)
115 {
116 tst_require_root();
117 check_mqns();
118 }
119
main(int argc,char * argv[])120 int main(int argc, char *argv[])
121 {
122 int r;
123 mqd_t mqd;
124 char buf[30];
125 int use_clone = T_UNSHARE;
126
127 setup();
128
129 if (argc == 2 && strcmp(argv[1], "-clone") == 0) {
130 tst_resm(TINFO,
131 "Testing posix mq namespaces through clone(2).");
132 use_clone = T_CLONE;
133 } else
134 tst_resm(TINFO,
135 "Testing posix mq namespaces through unshare(2).");
136
137 if (pipe(p1) == -1 || pipe(p2) == -1) {
138 tst_brkm(TBROK | TERRNO, NULL, "pipe");
139 }
140
141 /* fire off the test */
142 r = do_clone_unshare_test(use_clone, CLONE_NEWIPC, check_mqueue, NULL);
143 if (r < 0) {
144 tst_brkm(TFAIL, NULL, "failed clone/unshare");
145 }
146
147 tst_resm(TINFO, "Checking namespaces isolation (child to parent)");
148
149 close(p1[0]);
150 close(p2[1]);
151 if (write(p1[1], "go", strlen("go") + 1) < 0) {
152 tst_brkm(TBROK, NULL, "write(p1[1], \"go\", ..) failed");
153 }
154
155 if (read(p2[0], buf, 7) < 0) {
156 tst_resm(TBROK | TERRNO, "read(p2[0], ..) failed");
157 } else if (!strcmp(buf, "mqfail")) {
158 tst_resm(TFAIL, "child process could not create mqueue");
159 umount(DEV_MQUEUE);
160 } else if (strcmp(buf, "mqopen")) {
161 tst_resm(TFAIL, "child process could not create mqueue");
162 umount(DEV_MQUEUE);
163 } else {
164 mqd = ltp_syscall(__NR_mq_open, NOSLASH_MQ1, O_RDONLY);
165 if (mqd == -1) {
166 tst_resm(TPASS,
167 "Parent process can't see the mqueue");
168 } else {
169 tst_resm(TFAIL | TERRNO,
170 "Parent process found mqueue");
171 mq_close(mqd);
172 }
173 if (write(p1[1], "cont", 5) < 0) {
174 tst_resm(TBROK | TERRNO, "write(p1[1], ..) failed");
175 }
176 read(p2[0], buf, 7);
177 }
178
179 tst_exit();
180 }
181