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MFC r314450,r313439:
[FreeBSD/stable/10.git] / contrib / netbsd-tests / fs / tmpfs / t_renamerace.c
1 /*      $NetBSD: t_renamerace.c,v 1.14 2017/01/13 21:30:40 christos 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 <fs/tmpfs/tmpfs_args.h>
25
26 #include "h_macros.h"
27
28 ATF_TC(renamerace2);
29 ATF_TC_HEAD(renamerace2, tc)
30 {
31         atf_tc_set_md_var(tc, "descr", "rename(2) lock order inversion");
32         atf_tc_set_md_var(tc, "timeout", "6");
33 }
34
35 static volatile int quittingtime = 0;
36 static pid_t wrkpid;
37
38 static void *
39 r2w1(void *arg)
40 {
41         int fd;
42
43         rump_pub_lwproc_newlwp(wrkpid);
44
45         fd = rump_sys_open("/file", O_CREAT | O_RDWR, 0777);
46         if (fd == -1)
47                 atf_tc_fail_errno("creat");
48         rump_sys_close(fd);
49
50         while (!quittingtime) {
51                 if (rump_sys_rename("/file", "/dir/file") == -1)
52                         atf_tc_fail_errno("rename 1");
53                 if (rump_sys_rename("/dir/file", "/file") == -1)
54                         atf_tc_fail_errno("rename 2");
55         }
56
57         return NULL;
58 }
59
60 static void *
61 r2w2(void *arg)
62 {
63         int fd;
64
65         rump_pub_lwproc_newlwp(wrkpid);
66
67         while (!quittingtime) {
68                 fd = rump_sys_open("/dir/file1", O_RDWR);
69                 if (fd != -1)
70                         rump_sys_close(fd);
71         }
72
73         return NULL;
74 }
75
76 ATF_TC_BODY(renamerace2, tc)
77 {
78         struct tmpfs_args args;
79         pthread_t pt[2];
80
81         /*
82          * Force SMP regardless of how many host CPUs there are.
83          * Deadlock is highly unlikely to trigger otherwise.
84          */
85         setenv("RUMP_NCPU", "2", 1);
86
87         rump_init();
88         memset(&args, 0, sizeof(args));
89         args.ta_version = TMPFS_ARGS_VERSION;
90         args.ta_root_mode = 0777;
91         if (rump_sys_mount(MOUNT_TMPFS, "/", 0, &args, sizeof(args)) == -1)
92                 atf_tc_fail_errno("could not mount tmpfs");
93
94         if (rump_sys_mkdir("/dir", 0777) == -1)
95                 atf_tc_fail_errno("cannot create directory");
96
97         RZ(rump_pub_lwproc_rfork(RUMP_RFCFDG));
98         RL(wrkpid = rump_sys_getpid());
99         pthread_create(&pt[0], NULL, r2w1, NULL);
100         pthread_create(&pt[1], NULL, r2w2, NULL);
101
102         /* usually triggers in <<1s for me */
103         sleep(4);
104         quittingtime = 1;
105
106         pthread_join(pt[0], NULL);
107         pthread_join(pt[1], NULL);
108 }
109
110 ATF_TP_ADD_TCS(tp)
111 {
112         ATF_TP_ADD_TC(tp, renamerace2);
113
114         return atf_no_error();
115 }