1 /*-
2 * Copyright (c) 2014 EMC Corp.
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 */
26
27 #include <sys/cdefs.h>
28 __FBSDID("$FreeBSD$");
29
30 #include <sys/param.h>
31 #include <errno.h>
32 #include <fcntl.h>
33 #include <signal.h>
34 #include <stdio.h>
35 #include <stdlib.h>
36 #include <strings.h>
37 #include <sys/limits.h>
38 #include <sys/stat.h>
39 #include <sys/sysctl.h>
40 #include <unistd.h>
41 #include <atf-c.h>
42
43 static volatile sig_atomic_t done;
44
45 #define AFILE "afile"
46 #define EXPANDBY 1000
47 #define PARALLEL 4
48 #define RENDEZVOUS "rendezvous"
49 #define VALUE "value"
50
51 ATF_TC_WITHOUT_HEAD(dup2__simple);
ATF_TC_BODY(dup2__simple,tc)52 ATF_TC_BODY(dup2__simple, tc)
53 {
54 int fd1, fd2;
55 struct stat sb1, sb2;
56
57 ATF_REQUIRE((fd1 = open(AFILE, O_CREAT, 0644)) != -1);
58 fd2 = 27;
59 ATF_REQUIRE(dup2(fd1, fd2) != -1);
60 ATF_REQUIRE(fstat(fd1, &sb1) != -1);
61 ATF_REQUIRE(fstat(fd2, &sb2) != -1);
62 ATF_REQUIRE(bcmp(&sb1, &sb2, sizeof(sb1)) == 0);
63 }
64
65 ATF_TC(dup2__ebadf_when_2nd_arg_out_of_range);
ATF_TC_HEAD(dup2__ebadf_when_2nd_arg_out_of_range,tc)66 ATF_TC_HEAD(dup2__ebadf_when_2nd_arg_out_of_range, tc)
67 {
68 atf_tc_set_md_var(tc, "descr", "Regression test for r234131");
69 }
70
ATF_TC_BODY(dup2__ebadf_when_2nd_arg_out_of_range,tc)71 ATF_TC_BODY(dup2__ebadf_when_2nd_arg_out_of_range, tc)
72 {
73 int fd1, fd2, ret;
74
75 ATF_REQUIRE((fd1 = open(AFILE, O_CREAT, 0644)) != -1);
76 fd2 = INT_MAX;
77 ret = dup2(fd1, fd2);
78 ATF_CHECK_EQ(-1, ret);
79 ATF_CHECK_EQ(EBADF, errno);
80 }
81
82 static void
handler(int s __unused)83 handler(int s __unused)
84 {
85 done++;
86 }
87
88 static void
openfiles2(size_t n)89 openfiles2(size_t n)
90 {
91 size_t i;
92 int r;
93
94 errno = 0;
95 for (i = 0; i < n; i++)
96 ATF_REQUIRE((r = open(AFILE, O_RDONLY)) != -1);
97 kill(getppid(), SIGUSR1);
98
99 for (;;) {
100 if (access(RENDEZVOUS, R_OK) != 0)
101 break;
102 usleep(1000);
103 }
104 _exit(0);
105 }
106
107 static void
openfiles(size_t n)108 openfiles(size_t n)
109 {
110 int i, fd;
111
112 signal(SIGUSR1, handler);
113 ATF_REQUIRE((fd = open(AFILE, O_CREAT, 0644)) != -1);
114 close(fd);
115 ATF_REQUIRE((fd = open(RENDEZVOUS, O_CREAT, 0644)) != -1);
116 close(fd);
117 done = 0;
118 for (i = 0; i < PARALLEL; i++)
119 if (fork() == 0)
120 openfiles2(n / PARALLEL);
121 while (done != PARALLEL)
122 usleep(1000);
123 unlink(RENDEZVOUS);
124 usleep(40000);
125 }
126
127 ATF_TC_WITH_CLEANUP(kern_maxfiles__increase);
ATF_TC_HEAD(kern_maxfiles__increase,tc)128 ATF_TC_HEAD(kern_maxfiles__increase, tc)
129 {
130 atf_tc_set_md_var(tc, "require.user", "root");
131 atf_tc_set_md_var(tc, "require.config", "allow_sysctl_side_effects");
132 atf_tc_set_md_var(tc, "descr",
133 "Check kern.maxfiles expansion");
134 }
135
ATF_TC_BODY(kern_maxfiles__increase,tc)136 ATF_TC_BODY(kern_maxfiles__increase, tc)
137 {
138 size_t oldlen;
139 int maxfiles, oldmaxfiles, current;
140 char buf[80];
141
142 oldlen = sizeof(maxfiles);
143 if (sysctlbyname("kern.maxfiles", &maxfiles, &oldlen, NULL, 0) == -1)
144 atf_tc_fail("getsysctlbyname(%s): %s", "kern.maxfiles",
145 strerror(errno));
146 if (sysctlbyname("kern.openfiles", ¤t, &oldlen, NULL, 0) == -1)
147 atf_tc_fail("getsysctlbyname(%s): %s", "kern.openfiles",
148 strerror(errno));
149
150 oldmaxfiles = maxfiles;
151
152 /* Store old kern.maxfiles in a symlink for cleanup */
153 snprintf(buf, sizeof(buf), "%d", oldmaxfiles);
154 if (symlink(buf, VALUE) == 1)
155 atf_tc_fail("symlink(%s, %s): %s", buf, VALUE,
156 strerror(errno));
157
158 maxfiles += EXPANDBY;
159 if (sysctlbyname("kern.maxfiles", NULL, 0, &maxfiles, oldlen) == -1)
160 atf_tc_fail("getsysctlbyname(%s): %s", "kern.maxfiles",
161 strerror(errno));
162
163 openfiles(oldmaxfiles - current + 1);
164 (void)unlink(VALUE);
165 }
166
ATF_TC_CLEANUP(kern_maxfiles__increase,tc)167 ATF_TC_CLEANUP(kern_maxfiles__increase, tc)
168 {
169 size_t oldlen;
170 int n, oldmaxfiles;
171 char buf[80];
172
173 if ((n = readlink(VALUE, buf, sizeof(buf))) > 0) {
174 buf[MIN((size_t)n, sizeof(buf) - 1)] = '\0';
175 if (sscanf(buf, "%d", &oldmaxfiles) == 1) {
176 oldlen = sizeof(oldmaxfiles);
177 (void) sysctlbyname("kern.maxfiles", NULL, 0,
178 &oldmaxfiles, oldlen);
179 }
180 }
181 }
182
ATF_TP_ADD_TCS(tp)183 ATF_TP_ADD_TCS(tp)
184 {
185
186 ATF_TP_ADD_TC(tp, dup2__simple);
187 ATF_TP_ADD_TC(tp, dup2__ebadf_when_2nd_arg_out_of_range);
188 ATF_TP_ADD_TC(tp, kern_maxfiles__increase);
189
190 return (atf_no_error());
191 }
192