From mboxrd@z Thu Jan 1 00:00:00 1970 Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.remote-ip=209.85.208.42 ARC-Seal: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; cv=none; t=1794564173; b=u3e8xGDimmDBXqJ5bK1oqTSBZ4+RamOJ8nJ2H1BWu7cGccvGH4cCqAv6syhWEeaV7m1n gj/nqE2taD1nABZcjzouUglteiPoezACroejZmcOvSgSRKKniiG/3Bo1JlHh5wNQIMJcc YQobDdVyYOHoIg6N6avWvwAQHdVGnz8A3fX+CnhXCEzn9ylpDAcZDDOQoXu/pnaGxh/zm 5bweRnwq426K8NIBCm3Be/Qj03PlXe8yVbDxr4vlVeq96wrgiggnA6Otl9v0o7fxb69My +ujCE8bgvthyazJv8YIZZIr/4YvCrmqU4aWOvyoZJdgPxc8CEaX/zOhmHh5aCuHnzWg== ARC-Message-Signature: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; c=relaxed/relaxed; t=1794564173; h=DMARC-Filter:Received:DKIM-Signature:X-Google-DKIM-Signature: X-Forwarded-Encrypted:X-Gm-Message-State:X-Gm-Gg:X-Received:Received: Message-ID:Subject:From:To:Cc:Date:In-Reply-To:References: Content-Type:Content-Transfer-Encoding:User-Agent:MIME-Version; bh=QOKRfXbntKilXKCbQIPuMXmISRmnU6cXIBUGi5zYMoA=; b=0RNEX0ocPNNOX4NpbuCLAazQGRmEHngIcSQ4IVXd1vuer4V1GzlJSoNPwuig1PiO+SEE saoTpIqiA7rQCMKG7/PBM8bVy9ubhZn1yfdniTM0q2a3d8XuUFU9hpbovpaZhJv6S63Sg kG9zTh3hTzzvllGuOZwVDAqKxdTB1oyal3aME0VK4T3l+sbNLmZPbDiW1moepdlNs/IZf jSFNdP5bAXhz6ROBopNY0/2sgjrTWSS6nCKeoDN8f1qjCjyDczol3qYXE/Dy5T2WEdSC5 EH88JwKaGDRqfccoC3wsJ8/P8opHF7OqvLZ4n6rCDJA4iymk7erclyIQ3dZulB0mPbg== ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=none header.from=amutable.com; spf=pass smtp.mailfrom=amutable.com; dkim=pass header.d=amutable-com.20260707.gappssmtp.com header.i=@amutable-com.20260707.gappssmtp.com header.a=rsa-sha256 header.s=20260707 header.b=BrRghWve; arc=none smtp.remote-ip=209.85.208.42 Received: from mail-ed1-f42.google.com (mail-ed1-f42.google.com [209.85.208.42]) (using TLSv1.3 with cipher TLS_AES_128_GCM_SHA256 (128/128 bits) key-exchange X25519 server-signature ECDSA (prime256v1) server-digest SHA256) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id C9A6C606A8B0 for ; Fri, 13 Nov 2026 10:02:52 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.2 smtp.subspace.kernel.org C9A6C606A8B0 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=amutable.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=amutable.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=amutable-com.20260707.gappssmtp.com header.i=@amutable-com.20260707.gappssmtp.com header.a=rsa-sha256 header.s=20260707 header.b=BrRghWve Received: by mail-ed1-f42.google.com with SMTP id 4fb4d7f45d1cf-6b408f2d936so1439712a12.1 for ; Fri, 13 Nov 2026 02:02:52 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=amutable-com.20260707.gappssmtp.com; s=20260707; t=1794564171; x=1795168971; darn=vger.kernel.org; h=mime-version:user-agent:content-transfer-encoding:content-type :references:in-reply-to:date:cc:to:from:subject:message-id:from:to :cc:subject:date:message-id:reply-to:content-type; bh=QOKRfXbntKilXKCbQIPuMXmISRmnU6cXIBUGi5zYMoA=; b=BrRghWveZPMQ2lrGbo6B+XUgpff5EufUxldGFiTipoIaiFawRH8FVJvDBChKSCm+0U qE7NrwVrHQo2b1oiTPINBjADcjfu8j5+2hiB9wPnUB0Sj/3WgVbhatfBxMm3U8N4KnOM ecLP+89NGaRsX9nOgSryY2U8lUIJARrslqQpZFBfoMRf7b7aCNcM2ESlmVVEcyz67Zq1 nmg/xl76oWVlPrwozco+e18C71yw30j2TPM9TFHhbc2tHwAu5TUUkKbNr7mrc8DWNqok L5mLyN847Ry543yO7VRmUF69tZ0RGoya4bqZfEDQ44XXZ70j+SgMCotFLrfSWds1gzqN VQzg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20260707; t=1794564171; x=1795168971; h=mime-version:user-agent:content-transfer-encoding:content-type :references:in-reply-to:date:cc:to:from:subject:message-id:x-gm-gg :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to :content-type; bh=QOKRfXbntKilXKCbQIPuMXmISRmnU6cXIBUGi5zYMoA=; b=bJ014DVN3nqWfsmupIt4SxfSRvp3LkGAZMHMGr7xpzChjW4ZGdGUPeZsH8H4lGd0a0 15ke47AEEwxXI3M34vhoXcJQnaB4vThaj1j+FHep9hT6ldj7JZ/HdANGu6ej0SEzlKqy ncGHXEw0GhDL9pyCjG6iOumv+E9Kohso5R9HV/SiuUfHyVTVSXMw/CSIe8JSEmqJqKsJ 6sBb0kgIaXL4g+QXXwBThkCztQ3OKweWY6KVnzhqhKIMvkfEdZci8FMpE24nCnzlZ1fG F9Y0e3FCfUmllT8s3zjmu8Hh5fXBwLhJyhJcBuWNDruBdACgjyr0h064RZvOHm3r9Qjn S53w== X-Forwarded-Encrypted: i=1; AL+hErEsuJckWxSs4iaU3Z7WZH9hRh759unQNvrG/ef1HUOVe20digh039dWb0i6aGhn+eLR43Z5rgBUtGJf7vI=@vger.kernel.org X-Gm-Message-State: APuU4Z9U8KMBJKtUObtlylMh9i7XUPUntKH0j7mYqVNm0zrhoLlzJ7do c17muV9TJW0Hab5QDCfv89YdnBYQWH2AZPv0/yr/kX+L8L7VGWqBawqCjUO2XCtGfKkP X-Gm-Gg: AYBFou3uxcpyeqRq6oNUWLg27aDpwUBldwijs8WSNHSMN57EdPBbZfMip+DfGdQN41D fQ//sFZkN3Y6cskEXoTFj1RadEBiy1R7bB+9kOBK93i2l6eGSNLAOdcYSkLtgAWhKBt6BfYIzqt zecY+/lUalODlSnZS6K+AguEXZDXIHn0nJlkaTbyT3+HGrHUBsoxVCcDIeSbFP6kj/U4NkK7J0r pOLAIdJRrhvL7DOS6aXpjYkNy/LCyZFhnvS625DvdIiGApfNqjt8IBFG7Z4SX6O0ZsLVDZRYwNf UMbmYXPqeEP9kMVdXTa4UvP5Yv5GCkIuFT1vK/VyIjAIDOLIr4gVDdfH646LWTKLojLt0nUcyZN XE+tkHTPBP0XSmnf2e4IUJGkJ9hiyzGG7sC/mcPwi1twaUbIINv36VZD7bXL5A8IaQLTslast4x u2rifJqa4LRG+9caJFLINpg0JgzpMl4TMdqJ8NnYwdqaebr91y57lAKsGfP7GMSBlgZDIZhJ9so WBxsMXxMi3ho0CZg8HRvF6Z+WbigAMbyQpz2GM95tqPSAe7Af7rO8OaUNwrz1oqWgaDo1OHWA5z b99Iw+vTVqfArhNVZ7EHxtzr1tmoq65j5++mN2Hg/VEYge5VWBant58LiWY7qOY= X-Received: by 2002:aa7:c842:0:b0:6b7:82cf:f69f with SMTP id 4fb4d7f45d1cf-6b7c0ceaefemr1298014a12.41.1794564171137; Fri, 13 Nov 2026 02:02:51 -0800 (PST) Received: from [10.0.0.233] (tmo-086-54.customers.d1-online.com. [80.187.86.54]) by smtp.gmail.com with ESMTPSA id 4fb4d7f45d1cf-6b7c262338csm739270a12.33.2026.11.13.02.02.49 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 13 Nov 2026 02:02:50 -0800 (PST) Message-ID: <06b194053de4f4b65895248d1f2ba29d42a21b17.camel@amutable.com> Subject: Re: [PATCH RFC 06/41] proc: use fc_init_pseudo() From: Alexander Mikhalitsyn To: Christian Brauner , linux-fsdevel@vger.kernel.org Cc: Jann Horn , Chris Mason , Josef Bacik , Christoph Hellwig , linux-block@vger.kernel.org, linux-kernel@vger.kernel.org, linux-nvme@lists.infradead.org, Alexander Viro , Jan Kara , linux-scsi@vger.kernel.org, target-devel@vger.kernel.org, driver-core@lists.linux.dev, linux-mm@kvack.org, bpf@vger.kernel.org, linux-security-module@vger.kernel.org, selinux@vger.kernel.org, apparmor@lists.ubuntu.com, linux-nfs@vger.kernel.org, netdev@vger.kernel.org, fuse-devel@lists.linux.dev, linux-efi@vger.kernel.org, xen-devel@lists.xenproject.org, ocfs2-devel@lists.linux.dev, linux-s390@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-usb@vger.kernel.org, Amir Goldstein , linux-erofs@lists.ozlabs.org, linux-kselftest@vger.kernel.org Date: Fri, 13 Nov 2026 11:02:49 +0100 In-Reply-To: <20261110-work-loop-pseudo-v1-6-4c998976c6c7@kernel.org> References: <20261110-work-loop-pseudo-v1-0-4c998976c6c7@kernel.org> <20261110-work-loop-pseudo-v1-6-4c998976c6c7@kernel.org> Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable User-Agent: Evolution 3.56.2-0+deb13u1 X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 On Tue, 2026-11-10 at 10:14 +0100, Christian Brauner wrote: > Initialize procfs as a pseudo filesystem instead of raising > SB_I_NOEXEC and SB_I_NODEV by hand. This adds SB_I_PSEUDO. >=20 > Signed-off-by: Christian Brauner (Amutable) Reviewed-by: Alexander Mikhalitsyn > =C2=A0fs/proc/root.c | 4 ++-- > =C2=A01 file changed, 2 insertions(+), 2 deletions(-) >=20 > diff --git a/fs/proc/root.c b/fs/proc/root.c > index 7fbbe92bf73a..ca0e75081934 100644 > --- a/fs/proc/root.c > +++ b/fs/proc/root.c > @@ -17,6 +17,7 @@ > =C2=A0#include > =C2=A0#include > =C2=A0#include > +#include > =C2=A0#include > =C2=A0#include > =C2=A0#include > @@ -265,8 +266,6 @@ static int proc_fill_super(struct super_block *s, > struct fs_context *fc) > =C2=A0 if (ret) > =C2=A0 return ret; > =C2=A0 > - /* User space would break if executables or devices appear > on proc */ > - s->s_iflags |=3D SB_I_NOEXEC | SB_I_NODEV; > =C2=A0 s->s_flags |=3D SB_NODIRATIME | SB_NOSUID | SB_NOEXEC; > =C2=A0 s->s_blocksize =3D 1024; > =C2=A0 s->s_blocksize_bits =3D 10; > @@ -350,6 +349,7 @@ static int proc_init_fs_context(struct fs_context > *fc) > =C2=A0 put_user_ns(fc->user_ns); > =C2=A0 fc->user_ns =3D get_user_ns(ctx->pid_ns->user_ns); > =C2=A0 fc->fs_private =3D ctx; > + fc_init_pseudo(fc); > =C2=A0 fc->ops =3D &proc_fs_context_ops; > =C2=A0 return 0; > =C2=A0}