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: father mqns cannot be accessed from newinstance
20 *
21 * Mount mqueue fs
22 * Create a posix mq -->mq1
23 * unshare
24 * In unshared process:
25 * Mount newinstance mqueuefs
26 * Check that mq1 is not readable from new ns
27
28 ***************************************************************************/
29
30 #ifndef _GNU_SOURCE
31 #define _GNU_SOURCE
32 #endif
33 #include <sys/wait.h>
34 #include <errno.h>
35 #include <stdio.h>
36 #include <stdlib.h>
37 #include <string.h>
38 #include <unistd.h>
39 #include "mqns.h"
40 #include "mqns_helper.h"
41
42 char *TCID = "posixmq_namespace_01";
43 int TST_TOTAL = 1;
44
45 int p1[2];
46 int p2[2];
47
check_mqueue(void * vtest)48 int check_mqueue(void *vtest)
49 {
50 char buf[30];
51 mqd_t mqd;
52
53 (void) vtest;
54
55 close(p1[1]);
56 close(p2[0]);
57
58 if (read(p1[0], buf, strlen("go") + 1) < 0) {
59 printf("read(p1[0], ...) failed: %s\n", strerror(errno));
60 exit(1);
61 }
62 mqd = ltp_syscall(__NR_mq_open, NOSLASH_MQ1, O_RDONLY);
63 if (mqd == -1) {
64 if (write(p2[1], "notfnd", strlen("notfnd") + 1) < 0) {
65 perror("write(p2[1], ...) failed");
66 exit(1);
67 }
68 } else {
69 if (write(p2[1], "exists", strlen("exists") + 1) < 0) {
70 perror("write(p2[1], \"exists\", 7) failed");
71 exit(1);
72 } else if (mq_close(mqd) < 0) {
73 perror("mq_close(mqd) failed");
74 exit(1);
75 }
76 }
77
78 exit(0);
79 }
80
setup(void)81 static void setup(void)
82 {
83 tst_require_root();
84 check_mqns();
85 }
86
main(int argc,char * argv[])87 int main(int argc, char *argv[])
88 {
89 int r;
90 mqd_t mqd;
91 char buf[30];
92 int use_clone = T_UNSHARE;
93
94 setup();
95
96 if (argc == 2 && strcmp(argv[1], "-clone") == 0) {
97 tst_resm(TINFO,
98 "Testing posix mq namespaces through clone(2).");
99 use_clone = T_CLONE;
100 } else
101 tst_resm(TINFO,
102 "Testing posix mq namespaces through unshare(2).");
103
104 if (pipe(p1) == -1 || pipe(p2) == -1) {
105 tst_brkm(TBROK | TERRNO, NULL, "pipe failed");
106 }
107
108 mqd = ltp_syscall(__NR_mq_open, NOSLASH_MQ1, O_RDWR | O_CREAT | O_EXCL,
109 0777, NULL);
110 if (mqd == -1) {
111 perror("mq_open");
112 tst_brkm(TFAIL, NULL, "mq_open failed");
113 }
114
115 tst_resm(TINFO, "Checking namespaces isolation from parent to child");
116 /* fire off the test */
117 r = do_clone_unshare_test(use_clone, CLONE_NEWIPC, check_mqueue, NULL);
118 if (r < 0) {
119 tst_resm(TFAIL, "failed clone/unshare");
120 mq_close(mqd);
121 ltp_syscall(__NR_mq_unlink, NOSLASH_MQ1);
122 tst_exit();
123 }
124
125 close(p1[0]);
126 close(p2[1]);
127 if (write(p1[1], "go", strlen("go") + 1) < 0)
128 tst_resm(TBROK | TERRNO, "write(p1[1], \"go\", ...) failed");
129 else if (read(p2[0], buf, 7) < 0)
130 tst_resm(TBROK | TERRNO, "read(p2[0], buf, ...) failed");
131 else {
132 if (!strcmp(buf, "exists")) {
133 tst_resm(TFAIL, "child process found mqueue");
134 } else if (!strcmp(buf, "notfnd")) {
135 tst_resm(TPASS, "child process didn't find mqueue");
136 } else {
137 tst_resm(TFAIL, "UNKNOWN RESULT");
138 }
139 }
140
141 /* destroy the mqueue */
142 if (mq_close(mqd) == -1) {
143 tst_brkm(TBROK | TERRNO, NULL, "mq_close failed");
144 }
145 ltp_syscall(__NR_mq_unlink, NOSLASH_MQ1);
146
147 tst_exit();
148 }
149