1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
|
/*
* Copyright (c) International Business Machines Corp., 2007
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
* the GNU General Public License for more details.
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*
***************************************************************************/
#include "libclone.h"
int do_clone_tests(unsigned long clone_flags,
int (*fn1) (void *arg), void *arg1,
int (*fn2) (void *arg), void *arg2)
{
int ret;
ret = ltp_clone_quick(clone_flags | SIGCHLD, fn1, arg1);
if (ret == -1) {
return -1;
}
if (fn2)
ret = fn2(arg2);
else
ret = 0;
return ret;
}
int do_unshare_tests(unsigned long clone_flags,
int (*fn1) (void *arg), void *arg1,
int (*fn2) (void *arg), void *arg2)
{
int pid, ret = 0;
int retpipe[2];
char buf[2];
if (pipe(retpipe) == -1) {
perror("pipe");
return -1;
}
pid = fork();
if (pid == -1) {
perror("fork");
close(retpipe[0]);
close(retpipe[1]);
return -1;
}
if (pid == 0) {
close(retpipe[0]);
ret = tst_syscall(SYS_unshare, clone_flags);
if (ret == -1) {
if (write(retpipe[1], "0", 2) < 0) {
perror("unshare:write(retpipe[1], ..)");
}
close(retpipe[1]);
exit(1);
} else {
if (write(retpipe[1], "1", 2) < 0) {
perror("unshare:write(retpipe[1], ..)");
}
}
close(retpipe[1]);
ret = fn1(arg1);
exit(ret);
} else {
close(retpipe[1]);
if (read(retpipe[0], &buf, 2) < 0) {
perror("unshare:read(retpipe[0], ..)");
}
close(retpipe[0]);
if (*buf == '0')
return -1;
if (fn2)
ret = fn2(arg2);
}
return ret;
}
int do_plain_tests(int (*fn1) (void *arg), void *arg1,
int (*fn2) (void *arg), void *arg2)
{
int ret = 0, pid;
pid = fork();
if (pid == -1) {
perror("fork");
return -1;
}
if (pid == 0)
exit(fn1(arg1));
if (fn2)
ret = fn2(arg2);
return ret;
}
int do_clone_unshare_test(int use_clone, unsigned long clone_flags,
int (*fn1) (void *arg), void *arg1)
{
switch (use_clone) {
case T_NONE:
return do_plain_tests(fn1, arg1, NULL, NULL);
case T_CLONE:
return do_clone_tests(clone_flags, fn1, arg1, NULL, NULL);
case T_UNSHARE:
return do_unshare_tests(clone_flags, fn1, arg1, NULL, NULL);
default:
printf("%s: bad use_clone option: %d\n", __FUNCTION__,
use_clone);
return -1;
}
}
/*
* Run fn1 in a unshared environmnent, and fn2 in the original context
*/
int do_clone_unshare_tests(int use_clone, unsigned long clone_flags,
int (*fn1) (void *arg), void *arg1,
int (*fn2) (void *arg), void *arg2)
{
switch (use_clone) {
case T_NONE:
return do_plain_tests(fn1, arg1, fn2, arg2);
case T_CLONE:
return do_clone_tests(clone_flags, fn1, arg1, fn2, arg2);
case T_UNSHARE:
return do_unshare_tests(clone_flags, fn1, arg1, fn2, arg2);
default:
printf("%s: bad use_clone option: %d\n", __FUNCTION__,
use_clone);
return -1;
}
}
|
