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/* $NetBSD: t_renamerace.c,v 1.13 2011/08/18 21:44:55 riastradh Exp $ */
/*
* Modified for rump and atf from a program supplied
* by Nicolas Joly in kern/40948
*/
#include <sys/types.h>
#include <sys/mount.h>
#include <sys/utsname.h>
#include <atf-c.h>
#include <errno.h>
#include <fcntl.h>
#include <pthread.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <rump/rump.h>
#include <rump/rump_syscalls.h>
#include <fs/tmpfs/tmpfs_args.h>
#include "../../h_macros.h"
ATF_TC(renamerace2);
ATF_TC_HEAD(renamerace2, tc)
{
atf_tc_set_md_var(tc, "descr", "rename(2) lock order inversion");
atf_tc_set_md_var(tc, "timeout", "6");
}
static volatile int quittingtime = 0;
static pid_t wrkpid;
static void *
r2w1(void *arg)
{
int fd;
rump_pub_lwproc_newlwp(wrkpid);
fd = rump_sys_open("/file", O_CREAT | O_RDWR, 0777);
if (fd == -1)
atf_tc_fail_errno("creat");
rump_sys_close(fd);
while (!quittingtime) {
if (rump_sys_rename("/file", "/dir/file") == -1)
atf_tc_fail_errno("rename 1");
if (rump_sys_rename("/dir/file", "/file") == -1)
atf_tc_fail_errno("rename 2");
}
return NULL;
}
static void *
r2w2(void *arg)
{
int fd;
rump_pub_lwproc_newlwp(wrkpid);
while (!quittingtime) {
fd = rump_sys_open("/dir/file1", O_RDWR);
if (fd != -1)
rump_sys_close(fd);
}
return NULL;
}
ATF_TC_BODY(renamerace2, tc)
{
struct tmpfs_args args;
pthread_t pt[2];
/*
* Force SMP regardless of how many host CPUs there are.
* Deadlock is highly unlikely to trigger otherwise.
*/
setenv("RUMP_NCPU", "2", 1);
rump_init();
memset(&args, 0, sizeof(args));
args.ta_version = TMPFS_ARGS_VERSION;
args.ta_root_mode = 0777;
if (rump_sys_mount(MOUNT_TMPFS, "/", 0, &args, sizeof(args)) == -1)
atf_tc_fail_errno("could not mount tmpfs");
if (rump_sys_mkdir("/dir", 0777) == -1)
atf_tc_fail_errno("cannot create directory");
RZ(rump_pub_lwproc_rfork(RUMP_RFCFDG));
RL(wrkpid = rump_sys_getpid());
pthread_create(&pt[0], NULL, r2w1, NULL);
pthread_create(&pt[1], NULL, r2w2, NULL);
/* usually triggers in <<1s for me */
sleep(4);
quittingtime = 1;
pthread_join(pt[0], NULL);
pthread_join(pt[1], NULL);
}
ATF_TP_ADD_TCS(tp)
{
ATF_TP_ADD_TC(tp, renamerace2);
return atf_no_error();
}
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