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

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Message-ID: <403830bf-862c-6857-3e2f-5887e91c3280@redhat.com>
Date:   Tue, 26 Sep 2017 12:22:51 -0700
From:   Laura Abbott <labbott@...hat.com>
To:     Pintu Agarwal <pintu.ping@...il.com>, linux-kernel@...r.kernel.org
Cc:     pintu_agarwal@...oo.com
Subject: Re: [PATCH 1/1] [tools]: android/ion: userspace test utility for ion
 buffer sharing

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