t_renamerace.c revision 1.14 1 /* $NetBSD: t_renamerace.c,v 1.14 2010/11/11 17:44:44 pooka Exp $ */
2
3 /*
4 * Modified for rump and atf from a program supplied
5 * by Nicolas Joly in kern/40948
6 */
7
8 #include <sys/types.h>
9 #include <sys/mount.h>
10 #include <sys/utsname.h>
11
12 #include <atf-c.h>
13 #include <errno.h>
14 #include <fcntl.h>
15 #include <pthread.h>
16 #include <stdio.h>
17 #include <stdlib.h>
18 #include <string.h>
19 #include <unistd.h>
20
21 #include <rump/rump.h>
22 #include <rump/rump_syscalls.h>
23
24 #include "../common/h_fsmacros.h"
25 #include "../../h_macros.h"
26
27 static volatile int quittingtime;
28 pid_t wrkpid;
29
30 static void *
31 w1(void *arg)
32 {
33 int fd;
34
35 rump_pub_lwproc_newlwp(wrkpid);
36
37 while (!quittingtime) {
38 fd = rump_sys_open("rename.test1",
39 O_WRONLY|O_CREAT|O_TRUNC, 0666);
40 if (fd == -1 && errno != EEXIST)
41 atf_tc_fail_errno("create");
42 rump_sys_unlink("rename.test1");
43 rump_sys_close(fd);
44 }
45
46 return NULL;
47 }
48
49 static void *
50 w1_dirs(void *arg)
51 {
52
53 rump_pub_lwproc_newlwp(wrkpid);
54
55 while (!quittingtime) {
56 if (rump_sys_mkdir("rename.test1", 0777) == -1)
57 atf_tc_fail_errno("mkdir");
58 rump_sys_rmdir("rename.test1");
59 }
60
61 return NULL;
62 }
63
64 static void *
65 w2(void *arg)
66 {
67
68 rump_pub_lwproc_newlwp(wrkpid);
69
70 while (!quittingtime) {
71 rump_sys_rename("rename.test1", "rename.test2");
72 }
73
74 return NULL;
75 }
76
77 #define NWRK 8
78 static void
79 renamerace(const atf_tc_t *tc, const char *mp)
80 {
81 pthread_t pt1[NWRK], pt2[NWRK];
82 int i;
83
84 if (FSTYPE_LFS(tc))
85 atf_tc_expect_signal(-1, "PR kern/43582");
86
87 if (FSTYPE_MSDOS(tc))
88 atf_tc_skip("test fails in some setups, reason unknown");
89
90 if (FSTYPE_RUMPFS(tc))
91 atf_tc_skip("rename not supported by fs");
92
93 RZ(rump_pub_lwproc_newproc());
94 RL(wrkpid = rump_sys_getpid());
95
96 RL(rump_sys_chdir(mp));
97 for (i = 0; i < NWRK; i++)
98 pthread_create(&pt1[i], NULL, w1, NULL);
99
100 for (i = 0; i < NWRK; i++)
101 pthread_create(&pt2[i], NULL, w2, NULL);
102
103 sleep(5);
104 quittingtime = 1;
105
106 for (i = 0; i < NWRK; i++)
107 pthread_join(pt1[i], NULL);
108 for (i = 0; i < NWRK; i++)
109 pthread_join(pt2[i], NULL);
110 RL(rump_sys_chdir("/"));
111
112 /*
113 * XXX: does not always fail on LFS, especially for unicpu
114 * configurations. see other ramblings about racy tests.
115 */
116 if (FSTYPE_LFS(tc))
117 abort();
118 }
119
120 static void
121 renamerace_dirs(const atf_tc_t *tc, const char *mp)
122 {
123 pthread_t pt1, pt2;
124
125 if (FSTYPE_SYSVBFS(tc))
126 atf_tc_skip("directories not supported");
127
128 if (FSTYPE_RUMPFS(tc))
129 atf_tc_skip("rename not supported by fs");
130
131 /* XXX: msdosfs also sometimes hangs */
132 if (FSTYPE_FFS(tc) || FSTYPE_EXT2FS(tc) || FSTYPE_LFS(tc) ||
133 FSTYPE_MSDOS(tc))
134 atf_tc_expect_signal(-1, "PR kern/43626");
135
136 RZ(rump_pub_lwproc_newproc());
137 RL(wrkpid = rump_sys_getpid());
138
139 RL(rump_sys_chdir(mp));
140 pthread_create(&pt1, NULL, w1_dirs, NULL);
141 pthread_create(&pt2, NULL, w2, NULL);
142
143 sleep(5);
144 quittingtime = 1;
145
146 pthread_join(pt1, NULL);
147 pthread_join(pt2, NULL);
148 RL(rump_sys_chdir("/"));
149
150 /*
151 * Doesn't always trigger when run on a slow backend
152 * (i.e. not on tmpfs/mfs). So do the usual kludge.
153 */
154 if (FSTYPE_FFS(tc) || FSTYPE_EXT2FS(tc) || FSTYPE_LFS(tc) ||
155 FSTYPE_MSDOS(tc))
156 abort();
157 }
158
159 ATF_TC_FSAPPLY(renamerace, "rename(2) race with file unlinked mid-operation");
160 ATF_TC_FSAPPLY(renamerace_dirs, "rename(2) race with directories");
161
162 ATF_TP_ADD_TCS(tp)
163 {
164
165 ATF_TP_FSAPPLY(renamerace); /* PR kern/41128 */
166 ATF_TP_FSAPPLY(renamerace_dirs);
167
168 return atf_no_error();
169 }
170