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authorCyrill Gorcunov <gorcunov@gmail.com>2017-09-08 16:13:19 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2017-09-08 18:26:47 -0700
commit66559a691a5b4a3d79852a82c8c2f8532077b301 (patch)
treee79c6ab1dc113a841f417e100ef854b8e3f409b7 /tools/testing/selftests/kcmp
parentmm/sparse.c: fix typo in online_mem_sections (diff)
downloadlinux-dev-66559a691a5b4a3d79852a82c8c2f8532077b301.tar.xz
linux-dev-66559a691a5b4a3d79852a82c8c2f8532077b301.zip
tools/testing/selftests/kcmp/kcmp_test.c: add KCMP_EPOLL_TFD testing
KCMP's KCMP_EPOLL_TFD mode merged in commit 0791e3644e5ef2 ("kcmp: add KCMP_EPOLL_TFD mode to compare epoll target files") we've had no selftest for it yet (except in criu development list). Thus add it. Link: http://lkml.kernel.org/r/20170901151620.GK1898@uranus.lan Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org> Cc: Andrey Vagin <avagin@openvz.org> Cc: Pavel Emelyanov <xemul@virtuozzo.com> Cc: Michael Kerrisk <mtk.manpages@gmail.com> Cc: Shuah Khan <shuah@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'tools/testing/selftests/kcmp')
-rw-r--r--tools/testing/selftests/kcmp/kcmp_test.c60
1 files changed, 58 insertions, 2 deletions
diff --git a/tools/testing/selftests/kcmp/kcmp_test.c b/tools/testing/selftests/kcmp/kcmp_test.c
index a5a4da856dfe..73684c4a1ed6 100644
--- a/tools/testing/selftests/kcmp/kcmp_test.c
+++ b/tools/testing/selftests/kcmp/kcmp_test.c
@@ -8,7 +8,6 @@
#include <errno.h>
#include <string.h>
#include <fcntl.h>
-
#include <linux/unistd.h>
#include <linux/kcmp.h>
@@ -16,20 +15,28 @@
#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, int fd1, int fd2)
+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();
@@ -39,6 +46,37 @@ int main(int argc, char **argv)
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");
@@ -95,6 +133,24 @@ int main(int argc, char **argv)
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)