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
45char *TCID = "posixmq_namespace_02";
46int TST_TOTAL = 1;
47
48int p1[2];
49int p2[2];
50
51int 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
114static void setup(void)
115{
116	tst_require_root();
117	check_mqns();
118}
119
120int 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