166 lines
3.5 KiB
C
166 lines
3.5 KiB
C
#define _GNU_SOURCE
|
|
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <signal.h>
|
|
#include <limits.h>
|
|
#include <unistd.h>
|
|
#include <errno.h>
|
|
#include <string.h>
|
|
#include <fcntl.h>
|
|
#include <linux/unistd.h>
|
|
#include <linux/kcmp.h>
|
|
|
|
#include <sys/syscall.h>
|
|
#include <sys/types.h>
|
|
#include <sys/stat.h>
|
|
#include <sys/wait.h>
|
|
#include <sys/epoll.h>
|
|
|
|
#include "../kselftest.h"
|
|
|
|
static long sys_kcmp(int pid1, int pid2, int type, unsigned long fd1, unsigned long fd2)
|
|
{
|
|
return syscall(__NR_kcmp, pid1, pid2, type, fd1, fd2);
|
|
}
|
|
|
|
static const unsigned int duped_num = 64;
|
|
|
|
int main(int argc, char **argv)
|
|
{
|
|
const char kpath[] = "kcmp-test-file";
|
|
struct kcmp_epoll_slot epoll_slot;
|
|
struct epoll_event ev;
|
|
int pid1, pid2;
|
|
int pipefd[2];
|
|
int fd1, fd2;
|
|
int epollfd;
|
|
int status;
|
|
int fddup;
|
|
|
|
fd1 = open(kpath, O_RDWR | O_CREAT | O_TRUNC, 0644);
|
|
pid1 = getpid();
|
|
|
|
if (fd1 < 0) {
|
|
perror("Can't create file");
|
|
ksft_exit_fail();
|
|
}
|
|
|
|
if (pipe(pipefd)) {
|
|
perror("Can't create pipe");
|
|
ksft_exit_fail();
|
|
}
|
|
|
|
epollfd = epoll_create1(0);
|
|
if (epollfd < 0) {
|
|
perror("epoll_create1 failed");
|
|
ksft_exit_fail();
|
|
}
|
|
|
|
memset(&ev, 0xff, sizeof(ev));
|
|
ev.events = EPOLLIN | EPOLLOUT;
|
|
|
|
if (epoll_ctl(epollfd, EPOLL_CTL_ADD, pipefd[0], &ev)) {
|
|
perror("epoll_ctl failed");
|
|
ksft_exit_fail();
|
|
}
|
|
|
|
fddup = dup2(pipefd[1], duped_num);
|
|
if (fddup < 0) {
|
|
perror("dup2 failed");
|
|
ksft_exit_fail();
|
|
}
|
|
|
|
if (epoll_ctl(epollfd, EPOLL_CTL_ADD, fddup, &ev)) {
|
|
perror("epoll_ctl failed");
|
|
ksft_exit_fail();
|
|
}
|
|
close(fddup);
|
|
|
|
pid2 = fork();
|
|
if (pid2 < 0) {
|
|
perror("fork failed");
|
|
ksft_exit_fail();
|
|
}
|
|
|
|
if (!pid2) {
|
|
int pid2 = getpid();
|
|
int ret;
|
|
|
|
fd2 = open(kpath, O_RDWR, 0644);
|
|
if (fd2 < 0) {
|
|
perror("Can't open file");
|
|
ksft_exit_fail();
|
|
}
|
|
|
|
/* An example of output and arguments */
|
|
printf("pid1: %6d pid2: %6d FD: %2ld FILES: %2ld VM: %2ld "
|
|
"FS: %2ld SIGHAND: %2ld IO: %2ld SYSVSEM: %2ld "
|
|
"INV: %2ld\n",
|
|
pid1, pid2,
|
|
sys_kcmp(pid1, pid2, KCMP_FILE, fd1, fd2),
|
|
sys_kcmp(pid1, pid2, KCMP_FILES, 0, 0),
|
|
sys_kcmp(pid1, pid2, KCMP_VM, 0, 0),
|
|
sys_kcmp(pid1, pid2, KCMP_FS, 0, 0),
|
|
sys_kcmp(pid1, pid2, KCMP_SIGHAND, 0, 0),
|
|
sys_kcmp(pid1, pid2, KCMP_IO, 0, 0),
|
|
sys_kcmp(pid1, pid2, KCMP_SYSVSEM, 0, 0),
|
|
|
|
/* This one should fail */
|
|
sys_kcmp(pid1, pid2, KCMP_TYPES + 1, 0, 0));
|
|
|
|
/* This one should return same fd */
|
|
ret = sys_kcmp(pid1, pid2, KCMP_FILE, fd1, fd1);
|
|
if (ret) {
|
|
printf("FAIL: 0 expected but %d returned (%s)\n",
|
|
ret, strerror(errno));
|
|
ksft_inc_fail_cnt();
|
|
ret = -1;
|
|
} else {
|
|
printf("PASS: 0 returned as expected\n");
|
|
ksft_inc_pass_cnt();
|
|
}
|
|
|
|
/* Compare with self */
|
|
ret = sys_kcmp(pid1, pid1, KCMP_VM, 0, 0);
|
|
if (ret) {
|
|
printf("FAIL: 0 expected but %d returned (%s)\n",
|
|
ret, strerror(errno));
|
|
ksft_inc_fail_cnt();
|
|
ret = -1;
|
|
} else {
|
|
printf("PASS: 0 returned as expected\n");
|
|
ksft_inc_pass_cnt();
|
|
}
|
|
|
|
/* Compare epoll target */
|
|
epoll_slot = (struct kcmp_epoll_slot) {
|
|
.efd = epollfd,
|
|
.tfd = duped_num,
|
|
.toff = 0,
|
|
};
|
|
ret = sys_kcmp(pid1, pid1, KCMP_EPOLL_TFD, pipefd[1],
|
|
(unsigned long)(void *)&epoll_slot);
|
|
if (ret) {
|
|
printf("FAIL: 0 expected but %d returned (%s)\n",
|
|
ret, strerror(errno));
|
|
ksft_inc_fail_cnt();
|
|
ret = -1;
|
|
} else {
|
|
printf("PASS: 0 returned as expected\n");
|
|
ksft_inc_pass_cnt();
|
|
}
|
|
|
|
ksft_print_cnts();
|
|
|
|
if (ret)
|
|
ksft_exit_fail();
|
|
else
|
|
ksft_exit_pass();
|
|
}
|
|
|
|
waitpid(pid2, &status, P_ALL);
|
|
|
|
return ksft_exit_pass();
|
|
}
|