netdev - Re: [PATCH bpf] bpf: test_maps: cleanup sockmaps when test ends

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Date:   Mon, 22 Jan 2018 21:18:47 -0800
From:   John Fastabend <john.fastabend@...il.com>
To:     Alexei Starovoitov <alexei.starovoitov@...il.com>,
        Prashant Bhole <bhole_prashant_q7@....ntt.co.jp>
Cc:     "David S . Miller" <davem@...emloft.net>,
        Alexei Starovoitov <ast@...nel.org>,
        Daniel Borkmann <daniel@...earbox.net>,
        Shuah Khan <shuahkh@....samsung.com>, netdev@...r.kernel.org
Subject: Re: [PATCH bpf] bpf: test_maps: cleanup sockmaps when test ends

On 01/22/2018 09:01 PM, Alexei Starovoitov wrote:
> On Tue, Jan 23, 2018 at 01:55:30PM +0900, Prashant Bhole wrote:
>>
>>
>> On 1/23/2018 1:38 PM, Alexei Starovoitov wrote:
>>> On Tue, Jan 23, 2018 at 01:30:44PM +0900, Prashant Bhole wrote:
>>>> Bug: BPF programs and maps related to sockmaps test exist in
>>>> memory even after test_maps ends
>>>>
>>>> This patch fixes it by empyting sockmaps when test ends.
>>>>
>>>> Fixes: 6f6d33f3b3d0f ("bpf: selftests add sockmap tests")
>>>> Signed-off-by: Prashant Bhole <bhole_prashant_q7@....ntt.co.jp>
>>>
>>> that's a fine workaround and I'm planning to apply this patch
>>> to bpf-next, but it's not a fix. The sockmap should have cleaned
>>> itself up.
>>
>> Ok. Do I need to re-submit it targeted to -bpf-next and without fixes tag?
> 
> No need. It's fine.
> 

Also I'm looking over sockmap code now for the bug, should have
something shortly.

Agree this is a nice cleanup of the test code though. On the other
hand I should add some explicit tests for this case (deleting map
with elements) as well though.

.John