1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * Copyright (c) International Business Machines Corp., 2009
4 * Veerendra C <[email protected]>
5 * Copyright (C) 2022 SUSE LLC Andrea Cervesato <[email protected]>
6 */
7
8 /*\
9 * [Description]
10 *
11 * Test SysV IPC message passing through different namespaces.
12 *
13 * [Algorithm]
14 *
15 * In parent process create a new mesgq with a specific key.
16 * In cloned process try to access the created mesgq.
17 *
18 * Test will PASS if the mesgq is readable when flag is None.
19 * Test will FAIL if the mesgq is readable when flag is Unshare or Clone or
20 * the message received is wrong.
21 */
22
23 #define _GNU_SOURCE
24
25 #include <sys/wait.h>
26 #include <sys/msg.h>
27 #include <sys/types.h>
28 #include "tst_safe_sysv_ipc.h"
29 #include "tst_test.h"
30 #include "common.h"
31
32 #define KEY_VAL 154326L
33 #define MSG_TYPE 5
34 #define MSG_TEXT "My message!"
35
36 static char *str_op;
37 static int use_clone;
38 static int ipc_id = -1;
39
40 struct msg_buf {
41 long mtype;
42 char mtext[80];
43 };
44
check_mesgq(void)45 static void check_mesgq(void)
46 {
47 int id, n;
48 struct msg_buf msg = {};
49
50 id = msgget(KEY_VAL, 0);
51
52 if (id < 0) {
53 if (use_clone == T_NONE)
54 tst_res(TFAIL, "Plain cloned process didn't find mesgq");
55 else
56 tst_res(TPASS, "%s: container didn't find mesgq", str_op);
57
58 return;
59 }
60
61 if (use_clone == T_NONE) {
62 tst_res(TPASS, "Plain cloned process found mesgq inside container");
63
64 n = SAFE_MSGRCV(id, &msg, sizeof(msg.mtext), MSG_TYPE, 0);
65
66 tst_res(TINFO, "Mesg read of %d bytes, Type %ld, Msg: %s", n, msg.mtype, msg.mtext);
67
68 if (strcmp(msg.mtext, MSG_TEXT))
69 tst_res(TFAIL, "Received the wrong text message");
70
71 return;
72 }
73
74 tst_res(TFAIL, "%s: container init process found mesgq", str_op);
75 }
76
run(void)77 static void run(void)
78 {
79 struct msg_buf msg = {
80 .mtype = MSG_TYPE,
81 .mtext = MSG_TEXT,
82 };
83
84 if (use_clone == T_NONE)
85 SAFE_MSGSND(ipc_id, &msg, strlen(msg.mtext), 0);
86
87 tst_res(TINFO, "mesgq namespaces test: %s", str_op);
88
89 clone_unshare_test(use_clone, CLONE_NEWIPC, check_mesgq);
90 }
91
setup(void)92 static void setup(void)
93 {
94 use_clone = get_clone_unshare_enum(str_op);
95 ipc_id = SAFE_MSGGET(KEY_VAL, IPC_CREAT | IPC_EXCL | 0600);
96 }
97
cleanup(void)98 static void cleanup(void)
99 {
100 if (ipc_id != -1) {
101 tst_res(TINFO, "Destroying message queue");
102 SAFE_MSGCTL(ipc_id, IPC_RMID, NULL);
103 }
104 }
105
106 static struct tst_test test = {
107 .test_all = run,
108 .setup = setup,
109 .cleanup = cleanup,
110 .needs_root = 1,
111 .forks_child = 1,
112 .options = (struct tst_option[]) {
113 { "m:", &str_op, "Test execution mode <clone|unshare|none>" },
114 {},
115 },
116 };
117