netdev - Re: [PATCH net-next v3] af_unix: pass pidfd flags via SCM

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Message-ID: <4251c4f5-3523-474a-9ada-59ac462f33fd@yandex.ru>
Date: Tue, 19 Nov 2024 12:47:01 +0300
From: stsp <stsp2@...dex.ru>
To: Kuniyuki Iwashima <kuniyu@...zon.com>
Cc: almasrymina@...gle.com, asml.silence@...il.com, axboe@...nel.dk,
 brauner@...nel.org, cyphar@...har.com, davem@...emloft.net,
 edumazet@...gle.com, gouhao@...ontech.com, horms@...nel.org,
 kees@...nel.org, krisman@...e.de, kuba@...nel.org,
 linux-kernel@...r.kernel.org, linux-kselftest@...r.kernel.org, mhal@...x.co,
 netdev@...r.kernel.org, oleg@...hat.com, pabeni@...hat.com,
 quic_abchauha@...cinc.com, shuah@...nel.org, tandersen@...flix.com,
 viro@...iv.linux.org.uk, willemb@...gle.com
Subject: Re: [PATCH net-next v3] af_unix: pass pidfd flags via SCM_PIDFD cmsg

18.11.2024 20:54, Kuniyuki Iwashima пишет:
> From: Stas Sergeev <stsp2@...dex.ru>
> Date: Sat, 16 Nov 2024 13:11:20 +0300
>> Currently SCM_PIDFD cmsg cannot be sent via unix socket
>> (returns -EINVAL) and SO_PASSPIDFD doesn't support flags.
>> The created pidfd always has flags set to 0.
>>
>> This patch implements SCM_PIDFD cmsg in AF_UNIX socket, which
>> can be used to send flags to SO_PASSPIDFD-enabled recipient.
>>
>> Self-test is added for the propagation of PIDFD_NONBLOCK flag.
>>
>> This is mainly needed for the future extensions, like eg this one:
>> https://lore.kernel.org/lkml/8288a08e-448b-43c2-82dc-59f87d0d9072@yandex.ru/T/#me1237e46deba8574b77834b7704e63559ffef9cb
>> where it was suggested to try solving the supplementary groups
>> problem with pidfd.
>>
>> Changes in v3: specify target tree in patch subject
> It seems you missed other feedback, especially __scm_recv_common()
> needs a small change.

Yes, sorry. :( Too long quotes.
And what's worse, I've just found this
and many other lkml e-mails in spam.
I was under deep impression that no
one replies to me.

Sigh. E-mail sucks. Or just me.

> net-next is closed during the merge window for v6.13-rc1, so please
> post v4 after Dec 2nd.
> https://lore.kernel.org/netdev/20241118071654.695bb1a2@kernel.org/

Ok, thank you!