/*
* stress_kcmp
* stress sys_kcmp
*/
static int stress_kcmp(const args_t *args)
{
pid_t pid1;
int fd1;
#if defined(HAVE_SYS_EPOLL_H) && NEED_GLIBC(2,3,2)
int efd, sfd;
int so_reuseaddr = 1;
struct epoll_event ev;
struct sockaddr *addr = NULL;
socklen_t addr_len = 0;
#endif
int ret = EXIT_SUCCESS;
static const char *capfail =
"need CAP_SYS_PTRACE capability to run kcmp stressor, "
"aborting stress test\n";
if ((fd1 = open("/dev/null", O_WRONLY)) < 0) {
pr_fail_err("open");
return EXIT_FAILURE;
}
#if defined(HAVE_SYS_EPOLL_H) && NEED_GLIBC(2,3,2)
efd = -1;
if ((sfd = socket(AF_INET, SOCK_STREAM, 0)) < 0) {
sfd = -1;
goto again;
}
if (setsockopt(sfd, SOL_SOCKET, SO_REUSEADDR,
&so_reuseaddr, sizeof(so_reuseaddr)) < 0) {
(void)close(sfd);
sfd = -1;
goto again;
}
stress_set_sockaddr(args->name, args->instance, args->ppid,
AF_INET, 23000, &addr, &addr_len, NET_ADDR_ANY);
if (bind(sfd, addr, addr_len) < 0) {
(void)close(sfd);
sfd = -1;
goto again;
}
if (listen(sfd, SOMAXCONN) < 0) {
(void)close(sfd);
sfd = -1;
goto again;
}
efd = epoll_create1(0);
if (efd < 0) {
(void)close(sfd);
sfd = -1;
efd = -1;
goto again;
}
(void)memset(&ev, 0, sizeof(ev));
ev.data.fd = efd;
ev.events = EPOLLIN | EPOLLET;
if (epoll_ctl(efd, EPOLL_CTL_ADD, sfd, &ev) < 0) {
(void)close(sfd);
(void)close(efd);
sfd = -1;
efd = -1;
}
#endif
again:
pid1 = fork();
if (pid1 < 0) {
if (g_keep_stressing_flag &&
((errno == EAGAIN) || (errno == ENOMEM)))
goto again;
pr_fail_dbg("fork");
(void)close(fd1);
#if defined(HAVE_SYS_EPOLL_H) && NEED_GLIBC(2,3,2)
if (sfd != -1)
(void)close(sfd);
#endif
return EXIT_FAILURE;
} else if (pid1 == 0) {
(void)setpgid(0, g_pgrp);
stress_parent_died_alarm();
/* Child */
while (g_keep_stressing_flag)
(void)pause();
/* will never get here */
(void)close(fd1);
#if defined(HAVE_SYS_EPOLL_H) && NEED_GLIBC(2,3,2)
if (efd != -1)
(void)close(efd);
if (sfd != -1)
(void)close(sfd);
#endif
_exit(EXIT_SUCCESS);
} else {
/* Parent */
int fd2, status, pid2;
(void)setpgid(pid1, g_pgrp);
pid2 = getpid();
if ((fd2 = open("/dev/null", O_WRONLY)) < 0) {
pr_fail_err("open");
ret = EXIT_FAILURE;
goto reap;
}
do {
KCMP(pid1, pid2, SHIM_KCMP_FILE, fd1, fd2);
KCMP(pid1, pid1, SHIM_KCMP_FILE, fd1, fd1);
KCMP(pid2, pid2, SHIM_KCMP_FILE, fd1, fd1);
KCMP(pid2, pid2, SHIM_KCMP_FILE, fd2, fd2);
KCMP(pid1, pid2, SHIM_KCMP_FILES, 0, 0);
KCMP(pid1, pid1, SHIM_KCMP_FILES, 0, 0);
KCMP(pid2, pid2, SHIM_KCMP_FILES, 0, 0);
KCMP(pid1, pid2, SHIM_KCMP_FS, 0, 0);
KCMP(pid1, pid1, SHIM_KCMP_FS, 0, 0);
KCMP(pid2, pid2, SHIM_KCMP_FS, 0, 0);
KCMP(pid1, pid2, SHIM_KCMP_IO, 0, 0);
KCMP(pid1, pid1, SHIM_KCMP_IO, 0, 0);
KCMP(pid2, pid2, SHIM_KCMP_IO, 0, 0);
KCMP(pid1, pid2, SHIM_KCMP_SIGHAND, 0, 0);
KCMP(pid1, pid1, SHIM_KCMP_SIGHAND, 0, 0);
KCMP(pid2, pid2, SHIM_KCMP_SIGHAND, 0, 0);
KCMP(pid1, pid2, SHIM_KCMP_SYSVSEM, 0, 0);
KCMP(pid1, pid1, SHIM_KCMP_SYSVSEM, 0, 0);
KCMP(pid2, pid2, SHIM_KCMP_SYSVSEM, 0, 0);
KCMP(pid1, pid2, SHIM_KCMP_VM, 0, 0);
KCMP(pid1, pid1, SHIM_KCMP_VM, 0, 0);
KCMP(pid2, pid2, SHIM_KCMP_VM, 0, 0);
#if defined(HAVE_SYS_EPOLL_H) && NEED_GLIBC(2,3,2)
if (efd != -1) {
struct kcmp_epoll_slot slot;
slot.efd = efd;
slot.tfd = sfd;
slot.toff = 0;
KCMP(pid1, pid2, SHIM_KCMP_EPOLL_TFD, efd, (unsigned long)&slot);
KCMP(pid2, pid1, SHIM_KCMP_EPOLL_TFD, efd, (unsigned long)&slot);
KCMP(pid2, pid2, SHIM_KCMP_EPOLL_TFD, efd, (unsigned long)&slot);
}
#endif
/* Same simple checks */
if (g_opt_flags & OPT_FLAGS_VERIFY) {
KCMP_VERIFY(pid1, pid1, SHIM_KCMP_FILE, fd1, fd1, 0);
KCMP_VERIFY(pid1, pid1, SHIM_KCMP_FILES, 0, 0, 0);
KCMP_VERIFY(pid1, pid1, SHIM_KCMP_FS, 0, 0, 0);
KCMP_VERIFY(pid1, pid1, SHIM_KCMP_IO, 0, 0, 0);
KCMP_VERIFY(pid1, pid1, SHIM_KCMP_SIGHAND, 0, 0, 0);
KCMP_VERIFY(pid1, pid1, SHIM_KCMP_SYSVSEM, 0, 0, 0);
KCMP_VERIFY(pid1, pid1, SHIM_KCMP_VM, 0, 0, 0);
KCMP_VERIFY(pid1, pid2, SHIM_KCMP_SYSVSEM, 0, 0, 0);
#if defined(HAVE_SYS_EPOLL_H) && NEED_GLIBC(2,3,2)
if (efd != -1) {
struct kcmp_epoll_slot slot;
slot.efd = efd;
slot.tfd = sfd;
slot.toff = 0;
KCMP(pid1, pid2, SHIM_KCMP_EPOLL_TFD, efd, (unsigned long)&slot);
}
#endif
}
inc_counter(args);
} while (keep_stressing());
reap:
if (fd2 >= 0)
(void)close(fd2);
(void)kill(pid1, SIGKILL);
(void)shim_waitpid(pid1, &status, 0);
(void)close(fd1);
}
#if defined(HAVE_SYS_EPOLL_H) && NEED_GLIBC(2,3,2)
if (efd != -1)
(void)close(efd);
if (sfd != -1)
(void)close(sfd);
#endif
return ret;
}
/*
* stress_kcmp
* stress sys_kcmp
*/
int stress_kcmp(
uint64_t *const counter,
const uint32_t instance,
const uint64_t max_ops,
const char *name)
{
pid_t pid1;
int fd1;
int ret = EXIT_SUCCESS;
(void)instance;
if ((fd1 = open("/dev/null", O_WRONLY)) < 0) {
pr_failed_err(name, "open");
return EXIT_FAILURE;
}
again:
pid1 = fork();
if (pid1 < 0) {
if (opt_do_run && (errno == EAGAIN))
goto again;
pr_failed_dbg(name, "fork");
(void)close(fd1);
return EXIT_FAILURE;
} else if (pid1 == 0) {
setpgid(0, pgrp);
/* Child */
while (opt_do_run)
pause();
/* will never get here */
(void)close(fd1);
exit(EXIT_SUCCESS);
} else {
/* Parent */
int fd2, status, pid2;
setpgid(pid1, pgrp);
pid2 = getpid();
if ((fd2 = open("/dev/null", O_WRONLY)) < 0) {
pr_failed_err(name, "open");
ret = EXIT_FAILURE;
goto reap;
}
do {
KCMP(pid1, pid2, KCMP_FILE, fd1, fd2);
KCMP(pid1, pid1, KCMP_FILE, fd1, fd1);
KCMP(pid2, pid2, KCMP_FILE, fd1, fd1);
KCMP(pid2, pid2, KCMP_FILE, fd2, fd2);
KCMP(pid1, pid2, KCMP_FILES, 0, 0);
KCMP(pid1, pid1, KCMP_FILES, 0, 0);
KCMP(pid2, pid2, KCMP_FILES, 0, 0);
KCMP(pid1, pid2, KCMP_FS, 0, 0);
KCMP(pid1, pid1, KCMP_FS, 0, 0);
KCMP(pid2, pid2, KCMP_FS, 0, 0);
KCMP(pid1, pid2, KCMP_IO, 0, 0);
KCMP(pid1, pid1, KCMP_IO, 0, 0);
KCMP(pid2, pid2, KCMP_IO, 0, 0);
KCMP(pid1, pid2, KCMP_SIGHAND, 0, 0);
KCMP(pid1, pid1, KCMP_SIGHAND, 0, 0);
KCMP(pid2, pid2, KCMP_SIGHAND, 0, 0);
KCMP(pid1, pid2, KCMP_SYSVSEM, 0, 0);
KCMP(pid1, pid1, KCMP_SYSVSEM, 0, 0);
KCMP(pid2, pid2, KCMP_SYSVSEM, 0, 0);
KCMP(pid1, pid2, KCMP_VM, 0, 0);
KCMP(pid1, pid1, KCMP_VM, 0, 0);
KCMP(pid2, pid2, KCMP_VM, 0, 0);
/* Same simple checks */
if (opt_flags & OPT_FLAGS_VERIFY) {
KCMP_VERIFY(pid1, pid1, KCMP_FILE, fd1, fd1, 0);
KCMP_VERIFY(pid1, pid1, KCMP_FILES, 0, 0, 0);
KCMP_VERIFY(pid1, pid1, KCMP_FS, 0, 0, 0);
KCMP_VERIFY(pid1, pid1, KCMP_IO, 0, 0, 0);
KCMP_VERIFY(pid1, pid1, KCMP_SIGHAND, 0, 0, 0);
KCMP_VERIFY(pid1, pid1, KCMP_SYSVSEM, 0, 0, 0);
KCMP_VERIFY(pid1, pid1, KCMP_VM, 0, 0, 0);
KCMP_VERIFY(pid1, pid2, KCMP_SYSVSEM, 0, 0, 0);
}
(*counter)++;
} while (opt_do_run && (!max_ops || *counter < max_ops));
reap:
if (fd2 >= 0)
(void)close(fd2);
(void)kill(pid1, SIGKILL);
(void)waitpid(pid1, &status, 0);
(void)close(fd1);
}
return ret;
}
