selftest: sync: basic tests for sw_sync framework (82208160) · Commits · 戴 / test

tools/testing/selftests/Makefile

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		@@ -23,6 +23,7 @@ TARGETS += seccomp
		TARGETS += sigaltstack
		TARGETS += size
		TARGETS += static_keys
		TARGETS += sync
		TARGETS += sysctl
		ifneq (1, $(quicktest))
		TARGETS += timers

tools/testing/selftests/sync/.gitignore

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		sync_test

tools/testing/selftests/sync/Makefile

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		CFLAGS += -O2 -g -std=gnu89 -pthread -Wall -Wextra
		CFLAGS += -I../../../../usr/include/
		LDFLAGS += -pthread

		TEST_PROGS = sync_test

		all: $(TEST_PROGS)

		include ../lib.mk

		OBJS = sync_test.o sync.o

		TESTS += sync_alloc.o

		sync_test: $(OBJS) $(TESTS)

		clean:
		$(RM) sync_test $(OBJS) $(TESTS)

tools/testing/selftests/sync/sw_sync.h

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		/*
		* sw_sync abstraction
		*
		* Copyright 2015-2016 Collabora Ltd.
		*
		* Based on the implementation from the Android Open Source Project,
		*
		* Copyright 2013 Google, Inc
		*
		* Permission is hereby granted, free of charge, to any person obtaining a
		* copy of this software and associated documentation files (the "Software"),
		* to deal in the Software without restriction, including without limitation
		* the rights to use, copy, modify, merge, publish, distribute, sublicense,
		* and/or sell copies of the Software, and to permit persons to whom the
		* Software is furnished to do so, subject to the following conditions:
		*
		* The above copyright notice and this permission notice shall be included in
		* all copies or substantial portions of the Software.
		*
		* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
		* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
		* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
		* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
		* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
		* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
		* OTHER DEALINGS IN THE SOFTWARE.
		*/

		#ifndef SELFTESTS_SW_SYNC_H
		#define SELFTESTS_SW_SYNC_H

		/*
		* sw_sync is mainly intended for testing and should not be compiled into
		* production kernels
		*/

		int sw_sync_timeline_create(void);
		int sw_sync_timeline_is_valid(int fd);
		int sw_sync_timeline_inc(int fd, unsigned int count);
		void sw_sync_timeline_destroy(int fd);

		int sw_sync_fence_create(int fd, const char *name, unsigned int value);
		int sw_sync_fence_is_valid(int fd);
		void sw_sync_fence_destroy(int fd);

		#endif

tools/testing/selftests/sync/sync.c

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		/*
		* sync / sw_sync abstraction
		* Copyright 2015-2016 Collabora Ltd.
		*
		* Based on the implementation from the Android Open Source Project,
		*
		* Copyright 2012 Google, Inc
		*
		* Permission is hereby granted, free of charge, to any person obtaining a
		* copy of this software and associated documentation files (the "Software"),
		* to deal in the Software without restriction, including without limitation
		* the rights to use, copy, modify, merge, publish, distribute, sublicense,
		* and/or sell copies of the Software, and to permit persons to whom the
		* Software is furnished to do so, subject to the following conditions:
		*
		* The above copyright notice and this permission notice shall be included in
		* all copies or substantial portions of the Software.
		*
		* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
		* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
		* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
		* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
		* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
		* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
		* OTHER DEALINGS IN THE SOFTWARE.
		*/

		#include <fcntl.h>
		#include <malloc.h>
		#include <poll.h>
		#include <stdint.h>
		#include <string.h>
		#include <unistd.h>

		#include <sys/ioctl.h>
		#include <sys/stat.h>
		#include <sys/types.h>

		#include "sync.h"
		#include "sw_sync.h"

		#include <linux/sync_file.h>


		/* SW_SYNC ioctls */
		struct sw_sync_create_fence_data {
		__u32 value;
		char name[32];
		__s32 fence;
		};

		#define SW_SYNC_IOC_MAGIC 'W'
		#define SW_SYNC_IOC_CREATE_FENCE _IOWR(SW_SYNC_IOC_MAGIC, 0,\
		struct sw_sync_create_fence_data)
		#define SW_SYNC_IOC_INC _IOW(SW_SYNC_IOC_MAGIC, 1, __u32)


		int sync_wait(int fd, int timeout)
		{
		struct pollfd fds;

		fds.fd = fd;
		fds.events = POLLIN \| POLLERR;

		return poll(&fds, 1, timeout);
		}

		int sync_merge(const char *name, int fd1, int fd2)
		{
		struct sync_merge_data data = {};
		int err;

		data.fd2 = fd2;
		strncpy(data.name, name, sizeof(data.name) - 1);
		data.name[sizeof(data.name) - 1] = '\0';

		err = ioctl(fd1, SYNC_IOC_MERGE, &data);
		if (err < 0)
		return err;

		return data.fence;
		}

		static struct sync_file_info *sync_file_info(int fd)
		{
		struct sync_file_info *info;
		struct sync_fence_info *fence_info;
		int err, num_fences;

		info = calloc(1, sizeof(*info));
		if (info == NULL)
		return NULL;

		err = ioctl(fd, SYNC_IOC_FILE_INFO, info);
		if (err < 0) {
		free(info);
		return NULL;
		}

		num_fences = info->num_fences;

		if (num_fences) {
		info->flags = 0;
		info->num_fences = num_fences;

		fence_info = calloc(num_fences, sizeof(*fence_info));
		if (!fence_info) {
		free(info);
		return NULL;
		}

		info->sync_fence_info = (uint64_t)fence_info;

		err = ioctl(fd, SYNC_IOC_FILE_INFO, info);
		if (err < 0) {
		free(fence_info);
		free(info);
		return NULL;
		}
		}

		return info;
		}

		static void sync_file_info_free(struct sync_file_info *info)
		{
		free((void *)info->sync_fence_info);
		free(info);
		}

		int sync_fence_size(int fd)
		{
		int count;
		struct sync_file_info *info = sync_file_info(fd);

		if (!info)
		return 0;

		count = info->num_fences;

		sync_file_info_free(info);

		return count;
		}

		int sync_fence_count_with_status(int fd, int status)
		{
		unsigned int i, count = 0;
		struct sync_fence_info *fence_info = NULL;
		struct sync_file_info *info = sync_file_info(fd);

		if (!info)
		return -1;

		fence_info = (struct sync_fence_info *)info->sync_fence_info;
		for (i = 0 ; i < info->num_fences ; i++) {
		if (fence_info[i].status == status)
		count++;
		}

		sync_file_info_free(info);

		return count;
		}

		int sw_sync_timeline_create(void)
		{
		return open("/sys/kernel/debug/sync/sw_sync", O_RDWR);
		}

		int sw_sync_timeline_inc(int fd, unsigned int count)
		{
		__u32 arg = count;

		return ioctl(fd, SW_SYNC_IOC_INC, &arg);
		}

		int sw_sync_timeline_is_valid(int fd)
		{
		int status;

		if (fd == -1)
		return 0;

		status = fcntl(fd, F_GETFD, 0);
		return (status >= 0);
		}

		void sw_sync_timeline_destroy(int fd)
		{
		if (sw_sync_timeline_is_valid(fd))
		close(fd);
		}

		int sw_sync_fence_create(int fd, const char *name, unsigned int value)
		{
		struct sw_sync_create_fence_data data = {};
		int err;

		data.value = value;
		strncpy(data.name, name, sizeof(data.name) - 1);
		data.name[sizeof(data.name) - 1] = '\0';

		err = ioctl(fd, SW_SYNC_IOC_CREATE_FENCE, &data);
		if (err < 0)
		return err;

		return data.fence;
		}

		int sw_sync_fence_is_valid(int fd)
		{
		/* Same code! */
		return sw_sync_timeline_is_valid(fd);
		}

		void sw_sync_fence_destroy(int fd)
		{
		if (sw_sync_fence_is_valid(fd))
		close(fd);
		}

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