linux-kernel - Re: [PATCH 1/1] [tools]: android/ion: userspace test utility for ion buffer sharing

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Date:   Wed, 27 Sep 2017 19:54:40 +0530
From:   Pintu Kumar <pintu.ping@...il.com>
To:     Laura Abbott <labbott@...hat.com>
Cc:     linux-kernel@...r.kernel.org, Pintu Kumar <pintu_agarwal@...oo.com>
Subject: Re: [PATCH 1/1] [tools]: android/ion: userspace test utility for ion
 buffer sharing

On Wed, Sep 27, 2017 at 12:52 AM, Laura Abbott <labbott@...hat.com> wrote:
> On 09/26/2017 11:08 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 as IPC to transfer an FD to another process
>> and install it.
>>
>> This utility demonstrates how ION buffer sharing can be implemented
>> between
>> two user space processes, using various heap ids.
>>
>> This utility is verified on Ubuntu 32-bit machine using 2 independent
>> process such as: ionapp_export (server) and ionapp_import (client).
>> First the server needs to be run to export FD to the client.
>> This utility works only if /dev/ion interface is present.
>>
>> Here is a sample demo example:
>>
>> linux-stable/tools/android/ion$ sudo ./ionapp_export.out -i 1 -s 10
>> heap_type: 2, heap_size: 10
>> Fill buffer content:
>> 0xfd 0xfd 0xfd 0xfd 0xfd 0xfd 0xfd 0xfd 0xfd 0xfd
>> Sharing fd: 6, Client fd: 5
>> <ion_close_buffer_fd>: buffer release successfully....
>>
>> linux-stable/tools/android/ion$ sudo ./ionapp_import.out
>> Received buffer fd: 4
>> Read buffer content:
>> 0xfd 0xfd 0xfd 0xfd 0xfd 0xfd 0xfd 0xfd 0xfd 0xfd
>> Fill buffer content:
>> 0xfd 0xfd 0xfd 0xfd 0xfd 0xfd 0xfd 0xfd 0xfd 0xfd 0xfd 0xfd 0xfd 0xfd
>> 0xfd 0xfd 0xfd 0xfd 0xfd 0xfd 0xfd 0xfd 0xfd 0xfd 0xfd 0xfd 0xfd 0xfd
>> 0xfd 0xfd 0xfd 0xfd
>> <ion_close_buffer_fd>: buffer release successfully....
>>
>> Signed-off-by: Pintu Agarwal<pintu.ping@...il.com>
>
>
> This is a good start on a test app for Ion but it needs to be
> updated to use the new ABI.

Thanks Laura for your feedback.
Can you point out what changes are required?

>
> Thanks,
> Laura