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Date: Fri, 20 Oct 2017 08:40:49 -0600
From: Shuah Khan <shuahkh@....samsung.com>
To: Pintu Kumar <pintu.ping@...il.com>
Cc: shuah@...nel.org, Laura Abbott <labbott@...hat.com>,
linux-kernel@...r.kernel.org, linux-kselftest@...r.kernel.org,
Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
dvhart@...radead.org,
Bamvor Zhang Jian <bamvor.zhangjian@...aro.org>,
Shuah Khan <shuahkh@....samsung.com>
Subject: Re: [PATCHv3 1/1] [tools/selftests]: android/ion: userspace test
utility for ion buffer sharing
On 10/18/2017 04:38 AM, Pintu Kumar wrote:
> On Wed, Oct 18, 2017 at 2:28 AM, Shuah Khan <shuah@...nel.org> wrote:
>> On 10/17/2017 02:21 PM, Laura Abbott wrote:
>>> On 10/14/2017 04:36 AM, Pintu Agarwal wrote:
>>>> This is a test utility to verify ION buffer sharing in user space
>>>> between 2 independent processes.
>>>> It uses unix domain socket (with SCM_RIGHTS) as IPC to transfer an FD to
>>>> another process to share the same buffer.
>>>> This utility demonstrates how ION buffer sharing can be implemented between
>>>> two user space processes, using various heap types.
>>>>
>>>> This utility is made to be run as part of kselftest framework in kernel.
>>>> The utility is verified on Ubuntu-32 bit system with Linux Kernel 4.14,
>>>> using ION system heap and CMA heap.
>>>>
>>>> For more information about the utility please check the README file.
>>>>
>>>> Signed-off-by: Pintu Agarwal <pintu.ping@...il.com>
>>>> ---
>>>> tools/testing/selftests/Makefile | 3 +-
>>>> tools/testing/selftests/android/Makefile | 44 ++++
>>>> tools/testing/selftests/android/ion/.gitignore | 2 +
>>>> tools/testing/selftests/android/ion/Makefile | 16 ++
>>>> tools/testing/selftests/android/ion/README | 132 +++++++++++
>>>> tools/testing/selftests/android/ion/config | 3 +
>>>> tools/testing/selftests/android/ion/ion_test.sh | 61 +++++
>>>> .../testing/selftests/android/ion/ionapp_export.c | 151 ++++++++++++
>>>> .../testing/selftests/android/ion/ionapp_import.c | 88 +++++++
>>>> tools/testing/selftests/android/ion/ionutils.c | 259 +++++++++++++++++++++
>>>> tools/testing/selftests/android/ion/ionutils.h | 55 +++++
>>>> tools/testing/selftests/android/ion/ipcsocket.c | 227 ++++++++++++++++++
>>>> tools/testing/selftests/android/ion/ipcsocket.h | 35 +++
>>>> tools/testing/selftests/android/run.sh | 3 +
>>>> 14 files changed, 1078 insertions(+), 1 deletion(-)
>>>> create mode 100644 tools/testing/selftests/android/Makefile
>>>> create mode 100644 tools/testing/selftests/android/ion/.gitignore
>>>> create mode 100644 tools/testing/selftests/android/ion/Makefile
>>>> create mode 100644 tools/testing/selftests/android/ion/README
>>>> create mode 100644 tools/testing/selftests/android/ion/config
>>>> create mode 100755 tools/testing/selftests/android/ion/ion_test.sh
>>>> create mode 100644 tools/testing/selftests/android/ion/ionapp_export.c
>>>> create mode 100644 tools/testing/selftests/android/ion/ionapp_import.c
>>>> create mode 100644 tools/testing/selftests/android/ion/ionutils.c
>>>> create mode 100644 tools/testing/selftests/android/ion/ionutils.h
>>>> create mode 100644 tools/testing/selftests/android/ion/ipcsocket.c
>>>> create mode 100644 tools/testing/selftests/android/ion/ipcsocket.h
>>>> create mode 100755 tools/testing/selftests/android/run.sh
>>>>
>>>> diff --git a/tools/testing/selftests/Makefile b/tools/testing/selftests/Makefile
>>>> index ff80564..61bc77b 100644
>>>> --- a/tools/testing/selftests/Makefile
>>>> +++ b/tools/testing/selftests/Makefile
>>>> @@ -1,4 +1,5 @@
>>>> -TARGETS = bpf
>>>> +TARGETS = android
>>>> +TARGETS += bpf
>>>> TARGETS += breakpoints
>>>> TARGETS += capabilities
>>>> TARGETS += cpufreq
>>>> diff --git a/tools/testing/selftests/android/Makefile b/tools/testing/selftests/android/Makefile
>>>> new file mode 100644
>>>> index 0000000..ee76446
>>>> --- /dev/null
>>>> +++ b/tools/testing/selftests/android/Makefile
>>>> @@ -0,0 +1,44 @@
>>>> +SUBDIRS := ion
>>>> +
>>>> +TEST_PROGS := run.sh
>>>> +
>>>> +.PHONY: all clean
>>>> +
>>>> +include ../lib.mk
>>>> +
>>>> +all:
>>>> + @for DIR in $(SUBDIRS); do \
>>>> + BUILD_TARGET=$(OUTPUT)/$$DIR; \
>>>> + mkdir $$BUILD_TARGET -p; \
>>>> + make OUTPUT=$$BUILD_TARGET -C $$DIR $@;\
>>>> + if [ -e $$DIR/$(TEST_PROGS) ]; then
>>>> + rsync -a $$DIR/$(TEST_PROGS) $$BUILD_TARGET/;
>>>> + fi
>>>> + done
>>>> +
>>>> +override define RUN_TESTS
>>>> + @cd $(OUTPUT); ./run.sh
>>>> +endef
>>>> +
>>>> +override define INSTALL_RULE
>>>> + mkdir -p $(INSTALL_PATH)
>>>> + install -t $(INSTALL_PATH) $(TEST_PROGS) $(TEST_PROGS_EXTENDED) $(TEST_FILES)
>>>> +
>>>> + @for SUBDIR in $(SUBDIRS); do \
>>>> + BUILD_TARGET=$(OUTPUT)/$$SUBDIR; \
>>>> + mkdir $$BUILD_TARGET -p; \
>>>> + $(MAKE) OUTPUT=$$BUILD_TARGET -C $$SUBDIR INSTALL_PATH=$(INSTALL_PATH)/$$SUBDIR install; \
>>>> + done;
>>>> +endef
>>>> +
>>>> +override define EMIT_TESTS
>>>> + echo "./run.sh"
>>>> +endef
>>>> +
>>>> +override define CLEAN
>>>> + @for DIR in $(SUBDIRS); do \
>>>> + BUILD_TARGET=$(OUTPUT)/$$DIR; \
>>>> + mkdir $$BUILD_TARGET -p; \
>>>> + make OUTPUT=$$BUILD_TARGET -C $$DIR $@;\
>>>> + done
>>>> +endef
>>>> diff --git a/tools/testing/selftests/android/ion/.gitignore b/tools/testing/selftests/android/ion/.gitignore
>>>> new file mode 100644
>>>> index 0000000..67e6f39
>>>> --- /dev/null
>>>> +++ b/tools/testing/selftests/android/ion/.gitignore
>>>> @@ -0,0 +1,2 @@
>>>> +ionapp_export
>>>> +ionapp_import
>>>> diff --git a/tools/testing/selftests/android/ion/Makefile b/tools/testing/selftests/android/ion/Makefile
>>>> new file mode 100644
>>>> index 0000000..b84e3b1
>>>> --- /dev/null
>>>> +++ b/tools/testing/selftests/android/ion/Makefile
>>>> @@ -0,0 +1,16 @@
>>>> +
>>>> +INCLUDEDIR := -I../../../../../drivers/staging/android/uapi/
>>>> +CFLAGS := $(INCLUDEDIR) -Wall -O2 -g
>>>> +
>>>> +TEST_GEN_FILES := ionapp_export ionapp_import
>>>> +
>>>> +all: $(TEST_GEN_FILES)
>>>> +
>>>> +$(TEST_GEN_FILES): ipcsocket.c ionutils.c
>>>> +
>>>> +TEST_PROGS := ion_test.sh
>>>> +
>>>> +include ../../lib.mk
>>>> +
>>>> +$(OUTPUT)/ionapp_export: ionapp_export.c ipcsocket.c ionutils.c
>>>> +$(OUTPUT)/ionapp_import: ionapp_import.c ipcsocket.c ionutils.c
>>>> diff --git a/tools/testing/selftests/android/ion/README b/tools/testing/selftests/android/ion/README
>>>> new file mode 100644
>>>> index 0000000..163e353
>>>> --- /dev/null
>>>> +++ b/tools/testing/selftests/android/ion/README
>>>> @@ -0,0 +1,132 @@
>>>> +ION BUFFER SHARING UTILITY
>>>> +==========================
>>>> +File: ion_test.sh : Utility to test ION driver buffer sharing mechanism.
>>>> +Author: Pintu Kumar <pintu.ping@...il.com>
>>>> +
>>>> +Introduction:
>>>> +-------------
>>>> +This is a test utility to verify ION buffer sharing in user space
>>>> +between 2 independent processes.
>>>> +It uses unix domain socket (with SCM_RIGHTS) as IPC to transfer an FD to
>>>> +another process to share the same buffer.
>>>> +This utility demonstrates how ION buffer sharing can be implemented between
>>>> +two user space processes, using various heap types.
>>>> +The following heap types are supported by ION driver.
>>>> +ION_HEAP_TYPE_SYSTEM (0)
>>>> +ION_HEAP_TYPE_SYSTEM_CONTIG (1)
>>>> +ION_HEAP_TYPE_CARVEOUT (2)
>>>> +ION_HEAP_TYPE_CHUNK (3)
>>>> +ION_HEAP_TYPE_DMA (4)
>>>> +
>>>> +By default only the SYSTEM and SYSTEM_CONTIG heaps are supported.
>>>> +Each heap is associated with the respective heap id.
>>>> +This utility is designed in the form of client/server program.
>>>> +The server part (ionapp_export) is the exporter of the buffer.
>>>> +It is responsible for creating an ION client, allocating the buffer based on
>>>> +the heap id, writing some data to this buffer and then exporting the FD
>>>> +(associated with this buffer) to another process using socket IPC.
>>>> +This FD is called as buffer FD (which is different than the ION client FD).
>>>> +
>>>> +The client part (ionapp_import) is the importer of the buffer.
>>>> +It retrives the FD from the socket data and installs into its address space.
>>>> +This new FD internally points to the same kernel buffer.
>>>> +So first it reads the data that is stored in this buffer and prints it.
>>>> +Then it writes the different size of data (it could be different data) to the
>>>> +same buffer.
>>>> +Finally the buffer FD must be closed by both the exporter and importer.
>>>> +Thus the same kernel buffer is shared among two user space processes using
>>>> +ION driver and only one time allocation.
>>>> +
>>>> +Prerequisite:
>>>> +-------------
>>>> +This utility works only if /dev/ion interface is present.
>>>> +The following configs needs to be enabled in kernel to include ion driver.
>>>> +CONFIG_ANDROID=y
>>>> +CONFIG_ION=y
>>>> +CONFIG_ION_SYSTEM_HEAP=y
>>>
>>> You also need CONFIG_STAGING right now as well.
>>
>
> Ok, added CONFIG_STAGING under config and README
>
>> In which case, please make sure the test fails gracefully when the
>> these config options are disabled.
>>
>> What does the test do when all of these options are disabled?
>>
> I assume that if these configs are not present the /dev/ion will also
> not exists.
> If that is the case then, I don't proceed with the test.
> This is checked under ion_test script using: check_device
>
>>>
>>>> +
>>>> +This utility requires to be run as root user.
>>>> +
>>>> +
>>>> +Compile and test:
>>>> +-----------------
>>>> +This utility is made to be run as part of kselftest framework in kernel.
>>>> +To compile and run using kselftest you can simply do the following from the
>>>> +kernel top directory.
>>>> +linux$ make TARGETS=android kselftest
>>
>> Please make sure
>>
>> make O=/tmp/kselftest TARGETS=android kselftest
>>
>> works.
>>
>
> Ok when I specify O as output directory. It did not work.
> ./run.sh: 3: ./run.sh: ./ion_test.sh: not found
> ../lib.mk:41: recipe for target 'run_tests' failed
>
> When I checked /tmp/kselftest/ion/, I see that ion_test.sh is not installed.
> Only the executable are installed.
> I followed the same Makefile as futex.
> Currently I am trying to figure out what could be the problem.
> Any hint will be really appreciated.
Please see the latest futex Makefile from 4.14. You will see that the
TEST_PROGS get copied from its all target for sub-dirs. You just have to
add a copy in that path
if [ -e $$DIR/$(TEST_PROGS) ]; then
rsync -a $$DIR/$(TEST_PROGS) $$BUILD_TARGET/;
fi
All target from futex/Makefile
all:
@for DIR in $(SUBDIRS); do \
BUILD_TARGET=$(OUTPUT)/$$DIR; \
mkdir $$BUILD_TARGET -p; \
make OUTPUT=$$BUILD_TARGET -C $$DIR $@;\
if [ -e $$DIR/$(TEST_PROGS) ]; then
rsync -a $$DIR/$(TEST_PROGS) $$BUILD_TARGET/;
fi
done
thanks,
-- Shuah
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