Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
selftests: ntsync: Add some tests for semaphore state.
Wine has tests for its synchronization primitives, but these are more accessible
to kernel developers, and also allow us to test some edge cases that Wine does
not care about.
This patch adds tests for semaphore-specific ioctls NTSYNC_IOC_SEM_POST and
NTSYNC_IOC_SEM_READ, and waiting on semaphores.
Signed-off-by: Elizabeth Figura <zfigura@codeweavers.com>
Link: https://lore.kernel.org/r/20241213193511.457338-17-zfigura@codeweavers.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
authored by
Elizabeth Figura
and committed by
Greg Kroah-Hartman
7f853a25
a138179a
+155
+1
tools/testing/selftests/Makefile
+1
tools/testing/selftests/Makefile
+1
tools/testing/selftests/drivers/ntsync/.gitignore
+1
tools/testing/selftests/drivers/ntsync/.gitignore
···
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ntsync
+7
tools/testing/selftests/drivers/ntsync/Makefile
+7
tools/testing/selftests/drivers/ntsync/Makefile
+1
tools/testing/selftests/drivers/ntsync/config
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tools/testing/selftests/drivers/ntsync/config
···
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CONFIG_WINESYNC=y
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tools/testing/selftests/drivers/ntsync/ntsync.c
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tools/testing/selftests/drivers/ntsync/ntsync.c
···
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// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Various unit tests for the "ntsync" synchronization primitive driver.
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*
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* Copyright (C) 2021-2022 Elizabeth Figura <zfigura@codeweavers.com>
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*/
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#define _GNU_SOURCE
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#include <sys/ioctl.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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#include <time.h>
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#include <pthread.h>
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#include <linux/ntsync.h>
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#include "../../kselftest_harness.h"
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static int read_sem_state(int sem, __u32 *count, __u32 *max)
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{
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struct ntsync_sem_args args;
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int ret;
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memset(&args, 0xcc, sizeof(args));
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ret = ioctl(sem, NTSYNC_IOC_SEM_READ, &args);
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*count = args.count;
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*max = args.max;
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return ret;
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}
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#define check_sem_state(sem, count, max) \
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({ \
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__u32 __count, __max; \
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int ret = read_sem_state((sem), &__count, &__max); \
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EXPECT_EQ(0, ret); \
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EXPECT_EQ((count), __count); \
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EXPECT_EQ((max), __max); \
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})
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static int release_sem(int sem, __u32 *count)
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{
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return ioctl(sem, NTSYNC_IOC_SEM_RELEASE, count);
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}
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static int wait_any(int fd, __u32 count, const int *objs, __u32 owner, __u32 *index)
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{
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struct ntsync_wait_args args = {0};
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struct timespec timeout;
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int ret;
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clock_gettime(CLOCK_MONOTONIC, &timeout);
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args.timeout = timeout.tv_sec * 1000000000 + timeout.tv_nsec;
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args.count = count;
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args.objs = (uintptr_t)objs;
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args.owner = owner;
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args.index = 0xdeadbeef;
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ret = ioctl(fd, NTSYNC_IOC_WAIT_ANY, &args);
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*index = args.index;
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return ret;
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}
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TEST(semaphore_state)
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{
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struct ntsync_sem_args sem_args;
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struct timespec timeout;
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__u32 count, index;
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int fd, ret, sem;
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clock_gettime(CLOCK_MONOTONIC, &timeout);
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fd = open("/dev/ntsync", O_CLOEXEC | O_RDONLY);
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ASSERT_LE(0, fd);
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sem_args.count = 3;
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sem_args.max = 2;
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sem = ioctl(fd, NTSYNC_IOC_CREATE_SEM, &sem_args);
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EXPECT_EQ(-1, sem);
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EXPECT_EQ(EINVAL, errno);
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sem_args.count = 2;
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sem_args.max = 2;
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sem = ioctl(fd, NTSYNC_IOC_CREATE_SEM, &sem_args);
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EXPECT_LE(0, sem);
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check_sem_state(sem, 2, 2);
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count = 0;
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ret = release_sem(sem, &count);
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EXPECT_EQ(0, ret);
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EXPECT_EQ(2, count);
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check_sem_state(sem, 2, 2);
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count = 1;
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ret = release_sem(sem, &count);
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EXPECT_EQ(-1, ret);
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EXPECT_EQ(EOVERFLOW, errno);
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check_sem_state(sem, 2, 2);
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ret = wait_any(fd, 1, &sem, 123, &index);
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EXPECT_EQ(0, ret);
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EXPECT_EQ(0, index);
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check_sem_state(sem, 1, 2);
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ret = wait_any(fd, 1, &sem, 123, &index);
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EXPECT_EQ(0, ret);
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EXPECT_EQ(0, index);
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check_sem_state(sem, 0, 2);
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ret = wait_any(fd, 1, &sem, 123, &index);
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EXPECT_EQ(-1, ret);
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EXPECT_EQ(ETIMEDOUT, errno);
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count = 3;
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ret = release_sem(sem, &count);
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EXPECT_EQ(-1, ret);
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EXPECT_EQ(EOVERFLOW, errno);
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check_sem_state(sem, 0, 2);
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count = 2;
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ret = release_sem(sem, &count);
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EXPECT_EQ(0, ret);
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EXPECT_EQ(0, count);
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check_sem_state(sem, 2, 2);
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ret = wait_any(fd, 1, &sem, 123, &index);
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EXPECT_EQ(0, ret);
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ret = wait_any(fd, 1, &sem, 123, &index);
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EXPECT_EQ(0, ret);
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count = 1;
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ret = release_sem(sem, &count);
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EXPECT_EQ(0, ret);
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EXPECT_EQ(0, count);
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check_sem_state(sem, 1, 2);
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count = ~0u;
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ret = release_sem(sem, &count);
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EXPECT_EQ(-1, ret);
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EXPECT_EQ(EOVERFLOW, errno);
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check_sem_state(sem, 1, 2);
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close(sem);
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close(fd);
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}
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TEST_HARNESS_MAIN