t_renamerace.c revision 1.9 1 /* $NetBSD: t_renamerace.c,v 1.9 2010/08/25 18:11:20 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
29 static void *
30 w1(void *arg)
31 {
32 int fd;
33
34 rump_pub_lwp_alloc_and_switch(0, 10);
35 rump_sys_chdir(arg);
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 rump_sys_chdir("/");
47
48 return NULL;
49 }
50
51 static void *
52 w1_dirs(void *arg)
53 {
54
55 rump_pub_lwp_alloc_and_switch(0, 10);
56 rump_sys_chdir(arg);
57
58 while (!quittingtime) {
59 if (rump_sys_mkdir("rename.test1", 0777) == -1)
60 atf_tc_fail_errno("mkdir");
61 rump_sys_rmdir("rename.test1");
62 }
63
64 rump_sys_chdir("/");
65
66 return NULL;
67 }
68
69 static void *
70 w2(void *arg)
71 {
72
73 rump_pub_lwp_alloc_and_switch(0, 11);
74 rump_sys_chdir(arg);
75
76 while (!quittingtime) {
77 rump_sys_rename("rename.test1", "rename.test2");
78 }
79
80 rump_sys_chdir("/");
81
82 return NULL;
83 }
84
85 #define NWRK 8
86 static void
87 renamerace(const atf_tc_t *tc, const char *mp)
88 {
89 pthread_t pt1[NWRK], pt2[NWRK];
90 int i;
91
92 if (FSTYPE_LFS(tc))
93 atf_tc_expect_signal(-1, "PR kern/43582");
94
95 if (FSTYPE_MSDOS(tc))
96 atf_tc_skip("test fails in some setups, reason unknown");
97
98 for (i = 0; i < NWRK; i++)
99 pthread_create(&pt1[i], NULL, w1, __UNCONST(mp));
100
101 for (i = 0; i < NWRK; i++)
102 pthread_create(&pt2[i], NULL, w2, __UNCONST(mp));
103
104 sleep(5);
105 quittingtime = 1;
106
107 for (i = 0; i < NWRK; i++)
108 pthread_join(pt1[i], NULL);
109 for (i = 0; i < NWRK; i++)
110 pthread_join(pt2[i], NULL);
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 * NFS sillyrename is broken and may linger on in the file system.
121 * This sleep lets them finish so we don't get transient unmount
122 * failures.
123 */
124 if (FSTYPE_NFS(tc))
125 sleep(1);
126 }
127
128 static void
129 renamerace_dirs(const atf_tc_t *tc, const char *mp)
130 {
131 pthread_t pt1, pt2;
132
133 if (FSTYPE_SYSVBFS(tc))
134 atf_tc_skip("directories not supported");
135
136 /* XXX: msdosfs also sometimes hangs */
137 if (FSTYPE_FFS(tc) || FSTYPE_EXT2FS(tc) || FSTYPE_LFS(tc) ||
138 FSTYPE_MSDOS(tc))
139 atf_tc_expect_signal(-1, "PR kern/43626");
140
141 pthread_create(&pt1, NULL, w1_dirs, __UNCONST(mp));
142 pthread_create(&pt2, NULL, w2, __UNCONST(mp));
143
144 sleep(5);
145 quittingtime = 1;
146
147 pthread_join(pt1, NULL);
148 pthread_join(pt2, NULL);
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