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From: "Kumar Kartikeya Dwivedi" <memxor@gmail.com>
To: "David Windsor" <dwindsor@gmail.com>, "Paul Moore" <paul@paul-moore.com>
Cc: "Alexei Starovoitov" <ast@kernel.org>,
	"Daniel Borkmann" <daniel@iogearbox.net>,
	"Andrii Nakryiko" <andrii@kernel.org>,
	"Martin KaFai Lau" <martin.lau@linux.dev>,
	"Eduard Zingerman" <eddyz87@gmail.com>,
	"Song Liu" <song@kernel.org>,
	"Yonghong Song" <yonghong.song@linux.dev>,
	"John Fastabend" <john.fastabend@gmail.com>,
	"KP Singh" <kpsingh@kernel.org>, "Jiri Olsa" <jolsa@kernel.org>,
	"Kumar Kartikeya Dwivedi" <memxor@gmail.com>,
	"Emil Tsalapatis" <emil@etsalapatis.com>,
	"Matt Bobrowski" <mattbobrowski@google.com>,
	"James Morris" <jmorris@namei.org>,
	"Serge E . Hallyn" <serge@hallyn.com>,
	"Casey Schaufler" <casey@schaufler-ca.com>,
	"Stephen Smalley" <stephen.smalley.work@gmail.com>,
	"Ondrej Mosnacek" <omosnace@redhat.com>,
	"Mimi Zohar" <zohar@linux.ibm.com>,
	"Roberto Sassu" <roberto.sassu@huawei.com>,
	"Dmitry Kasatkin" <dmitry.kasatkin@gmail.com>,
	"Eric Snowberg" <eric.snowberg@oracle.com>,
	"Alexander Viro" <viro@zeniv.linux.org.uk>,
	"Christian Brauner" <brauner@kernel.org>,
	"Jan Kara" <jack@suse.cz>, "Shuah Khan" <shuah@kernel.org>,
	<bpf@vger.kernel.org>, <linux-security-module@vger.kernel.org>,
	<linux-fsdevel@vger.kernel.org>,
	<linux-integrity@vger.kernel.org>, <selinux@vger.kernel.org>,
	<linux-kselftest@vger.kernel.org>, <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH v5 2/3] bpf: add bpf_init_inode_xattr kfunc for atomic inode labeling
Date: Mon, 20 Jul 2026 20:27:17 +0200	[thread overview]
Message-ID: <DK3LZOFOVG5L.3F34IKOCO1I04@gmail.com> (raw)
In-Reply-To: <CAEXv5_gt7BPWvdR4D1_3XJ0_XpBXWN52jeAOf1K2QJ7LL6CtPQ@mail.gmail.com>

On Mon Jul 20, 2026 at 8:12 PM CEST, David Windsor wrote:
> On Thu, Jul 16, 2026 at 5:55 PM Paul Moore <paul@paul-moore.com> wrote:
>>
>>
>> I'm sorry David, now that I'm seeing this function again, especially
>> with the LSM specific bits extracted into a LSM function, this absolutely
>> belongs somewhere under security/.  It's only callable from within a
>> BPF LSM callback and all it does outside of some BPF pointer boilerplate
>> is call right back into a LSM helper function.
>>
>> If the BPF maintainers aren't willing to accept that, then we will all
>> need to find another way.
>>
>
> Where this code lands doesn't matter to me, so I'll stay out of the
> decision of where it lives.
>
> If this kfunc goes to security/, would we also want to move eg
> bpf_set_dentry_xattr similarly?
>
> I'll roll v6 of this series meanwhile and we'll see what the BPF
> maintainers say.

I don't think there was any preference expressed from the BPF side. Logically,
one cannot be faulted for adding a kfunc to set the xattr for inode in the same
file where similar kfuncs to set xattr on other FS objects / entities exist.

The question about bpf_set_dentry_xattr is thus valid.

Anyway, I will leave it to Paul and Christian to decide between themselves where
it makes most sense for this one to live.

  reply	other threads:[~2026-07-20 18:27 UTC|newest]

Thread overview: 17+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2026-07-08  0:09 [PATCH v5 bpf-next 0/3] bpf: add bpf_init_inode_xattr kfunc for atomic inode labeling David Windsor
2026-07-08  0:09 ` [PATCH v5 bpf-next 1/3] security: rework inode_init_security xattr handling David Windsor
2026-07-16 21:55   ` [PATCH v5 " Paul Moore
2026-07-20 18:06     ` David Windsor
2026-07-20 20:41       ` Paul Moore
2026-07-08  0:09 ` [PATCH v5 bpf-next 2/3] bpf: add bpf_init_inode_xattr kfunc for atomic inode labeling David Windsor
2026-07-16 21:55   ` [PATCH v5 " Paul Moore
2026-07-20 18:12     ` David Windsor
2026-07-20 18:27       ` Kumar Kartikeya Dwivedi [this message]
2026-07-20 18:30         ` Kumar Kartikeya Dwivedi
2026-07-20 18:31           ` David Windsor
2026-07-20 20:15         ` Paul Moore
2026-07-20 21:24           ` Kumar Kartikeya Dwivedi
2026-07-20 22:47             ` Paul Moore
2026-07-08  0:09 ` [PATCH v5 bpf-next 3/3] selftests/bpf: add tests for bpf_init_inode_xattr kfunc David Windsor
2026-07-08  3:12 ` [PATCH v5 bpf-next 0/3] bpf: add bpf_init_inode_xattr kfunc for atomic inode labeling Kumar Kartikeya Dwivedi
2026-07-08 12:51   ` David Windsor

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