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selftests/filesystems: expand epoll with epoll_pwait2 

Code coverage for the epoll_pwait2 syscall.

epoll62: Repeat basic test epoll1, but exercising the new syscall.
epoll63: Pass a timespec and exercise the timeout wakeup path.

Link: https://lkml.kernel.org/r/20201121144401.3727659-5-willemdebruijn.kernel@gmail.com
Signed-off-by: Willem de Bruijn <willemb@google.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Matthew Wilcox (Oracle) <willy@infradead.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Willem de Bruijn 2020-12-18 14:05:44 -08:00 committed by Linus Torvalds
parent b0a0c2615f
commit e9ce39b5b3
1 changed files with 72 additions and 0 deletions
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72
tools/testing/selftests/filesystems/epoll/epoll_wakeup_test.c
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@ -1,6 +1,8 @@
// SPDX-License-Identifier: GPL-2.0
#define _GNU_SOURCE
#include <asm/unistd.h>
#include <linux/time_types.h>
#include <poll.h>
#include <unistd.h>
#include <assert.h>
@ -21,6 +23,19 @@ struct epoll_mtcontext
pthread_t waiter;
};
#ifndef __NR_epoll_pwait2
#define __NR_epoll_pwait2 -1
#endif
static inline int sys_epoll_pwait2(int fd, struct epoll_event *events,
int maxevents,
const struct __kernel_timespec *timeout,
const sigset_t *sigset, size_t sigsetsize)
{
return syscall(__NR_epoll_pwait2, fd, events, maxevents, timeout,
sigset, sigsetsize);
}
static void signal_handler(int signum)
{
}
@ -3377,4 +3392,61 @@ TEST(epoll61)
close(ctx.evfd);
}
/* Equivalent to basic test epoll1, but exercising epoll_pwait2. */
TEST(epoll62)
{
int efd;
int sfd[2];
struct epoll_event e;
ASSERT_EQ(socketpair(AF_UNIX, SOCK_STREAM, 0, sfd), 0);
efd = epoll_create(1);
ASSERT_GE(efd, 0);
e.events = EPOLLIN;
ASSERT_EQ(epoll_ctl(efd, EPOLL_CTL_ADD, sfd[0], &e), 0);
ASSERT_EQ(write(sfd[1], "w", 1), 1);
EXPECT_EQ(sys_epoll_pwait2(efd, &e, 1, NULL, NULL, 0), 1);
EXPECT_EQ(sys_epoll_pwait2(efd, &e, 1, NULL, NULL, 0), 1);
close(efd);
close(sfd[0]);
close(sfd[1]);
}
/* Epoll_pwait2 basic timeout test. */
TEST(epoll63)
{
const int cfg_delay_ms = 10;
unsigned long long tdiff;
struct __kernel_timespec ts;
int efd;
int sfd[2];
struct epoll_event e;
ASSERT_EQ(socketpair(AF_UNIX, SOCK_STREAM, 0, sfd), 0);
efd = epoll_create(1);
ASSERT_GE(efd, 0);
e.events = EPOLLIN;
ASSERT_EQ(epoll_ctl(efd, EPOLL_CTL_ADD, sfd[0], &e), 0);
ts.tv_sec = 0;
ts.tv_nsec = cfg_delay_ms * 1000 * 1000;
tdiff = msecs();
EXPECT_EQ(sys_epoll_pwait2(efd, &e, 1, &ts, NULL, 0), 0);
tdiff = msecs() - tdiff;
EXPECT_GE(tdiff, cfg_delay_ms);
close(efd);
close(sfd[0]);
close(sfd[1]);
}
TEST_HARNESS_MAIN