18.11.2024 20:54, Kuniyuki Iwashima пишет:
From: Stas Sergeev <stsp2@xxxxxxxxx>
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@xxxxxxxxx/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@xxxxxxxxxx/
Ok, thank you!
