t_renamerace.c revision 1.21 1 /* $NetBSD: t_renamerace.c,v 1.21 2011/03/06 16:00:16 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_RUMPFS(tc))
88 atf_tc_skip("rename not supported by fs");
89
90 RZ(rump_pub_lwproc_rfork(RUMP_RFCFDG));
91 RL(wrkpid = rump_sys_getpid());
92
93 RL(rump_sys_chdir(mp));
94 for (i = 0; i < NWRK; i++)
95 pthread_create(&pt1[i], NULL, w1, NULL);
96
97 for (i = 0; i < NWRK; i++)
98 pthread_create(&pt2[i], NULL, w2, NULL);
99
100 sleep(5);
101 quittingtime = 1;
102
103 for (i = 0; i < NWRK; i++)
104 pthread_join(pt1[i], NULL);
105 for (i = 0; i < NWRK; i++)
106 pthread_join(pt2[i], NULL);
107 RL(rump_sys_chdir("/"));
108
109 /*
110 * XXX: does not always fail on LFS, especially for unicpu
111 * configurations. see other ramblings about racy tests.
112 */
113 if (FSTYPE_LFS(tc))
114 abort();
115
116 if (FSTYPE_MSDOS(tc))
117 atf_tc_expect_fail("PR kern/44661");
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) || FSTYPE_FFSLOG(tc))
134 atf_tc_expect_signal(-1, "PR kern/43626");
135
136 /* XXX: unracy execution not caught */
137 if (FSTYPE_P2K_FFS(tc))
138 atf_tc_expect_fail("PR kern/44336"); /* child dies */
139
140 RZ(rump_pub_lwproc_rfork(RUMP_RFCFDG));
141 RL(wrkpid = rump_sys_getpid());
142
143 RL(rump_sys_chdir(mp));
144 pthread_create(&pt1, NULL, w1_dirs, NULL);
145 pthread_create(&pt2, NULL, w2, NULL);
146
147 sleep(5);
148 quittingtime = 1;
149
150 pthread_join(pt1, NULL);
151 pthread_join(pt2, NULL);
152 RL(rump_sys_chdir("/"));
153
154 /*
155 * Doesn't always trigger when run on a slow backend
156 * (i.e. not on tmpfs/mfs). So do the usual kludge.
157 */
158 if (FSTYPE_FFS(tc) || FSTYPE_EXT2FS(tc) || FSTYPE_LFS(tc) ||
159 FSTYPE_MSDOS(tc) || FSTYPE_FFSLOG(tc))
160 abort();
161
162 if (FSTYPE_P2K_FFS(tc)) {
163 /* XXX: some races may hang test run if we don't unmount */
164 puffs_fstest_unmount(tc, mp, MNT_FORCE);
165 atf_tc_fail("problem did not trigger");
166 }
167 }
168
169 ATF_TC_FSAPPLY(renamerace, "rename(2) race with file unlinked mid-operation");
170 ATF_TC_FSAPPLY(renamerace_dirs, "rename(2) race with directories");
171
172 ATF_TP_ADD_TCS(tp)
173 {
174
175 ATF_TP_FSAPPLY(renamerace); /* PR kern/41128 */
176 ATF_TP_FSAPPLY(renamerace_dirs);
177
178 return atf_no_error();
179 }
180