From mboxrd@z Thu Jan 1 00:00:00 1970 Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.remote-ip=100.103.45.18 ARC-Seal: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; cv=none; t=1794661720; b=Rn4vS2NY88LAHTG60G2dabfQWHLMuXjntlCoyG3hNWyLVqsoKwBee39t9rND1N0EaUvY smQrYueTNlGDb/0CTcbp7uMWXIqahWx0CW2xqKt/oOEj0FX4ZGSaW0iBLqY1YfJmJkaOR WNUbZA9PwrzJ0d5yOtKe8ENdY0E1aVBPGNWy0jyiCeYBXXCHbKEzSZq7qfTHbuawC4GH9 fCK1XU3ePxoqsnEgbRKwQxgIJq1bpFilHa8AkjOdzrAtVsKeAN1sayLUo0h6D1KHFnNrS wQyjhbQUOG89Utw5crOEPnKR1WkoPgdLQYz74/pHHUpt5qcXc/EHn6AqyK4I26bHRYw== ARC-Message-Signature: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; c=relaxed/relaxed; t=1794661720; h=Received:DKIM-Signature:From:Date:Subject:MIME-Version:Content-Type: Content-Transfer-Encoding:Message-Id:References:In-Reply-To:To:Cc: X-Mailer:X-Developer-Signature:X-Developer-Key; bh=IrVRaUgylyW7dx1wUoEgP8enLWWhiisOApdkF3tckhc=; b=Dg2doyJv5VuCBsV51TZQl94oNhlUTXwqboh8/SVj/1PTJaTVo0eyuvEX1Vf7SRywHxIV Cfv7lgiKLe9el7BQbNyc/O5zZRTHqeQZ3XEoA2FvCjOkvLhh+jofdiWPgcutiRr61IIm0 rCgY2nzRqsejPk2dc7sbXsyjoQEuWnlumwegXw8Ob+25GJlUlogtkePpNMtAFCXthZj0P M27Ynb9bWyDTppoCmH3pB+ejoilzt8qqQsDxtglMTa8PeqYzAK4mLtDoLJV6NxK5yJGMs tEqUDMBtgfXXHZpQzSbVI9nQ6yU1/MugY5d3qWkO9UHSOkqEEZG427GP4ucE4fQRqSg== ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256 header.s=k20260515 header.b=CSnJIGlX; arc=none smtp.remote-ip=100.103.45.18 Received: from smtp.kernel.org (quasi.space.kernel.org [100.103.45.18]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (prime256v1)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 67F0F606A8B2; Sat, 14 Nov 2026 13:08:40 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256 header.s=k20260515 header.b=CSnJIGlX Received: by smtp.kernel.org (Postfix) with ESMTPSA id BBB201F000C4; Sat, 14 Nov 2026 13:08:33 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1794661720; bh=IrVRaUgylyW7dx1wUoEgP8enLWWhiisOApdkF3tckhc=; h=From:Date:Subject:References:In-Reply-To:To:Cc; b=CSnJIGlXVCwPfZYGjaLB6IqanwTkuYMOqLjiIV98WyWx8/XlfQskQ4Ncrgj5RhMZR wSZWZkZtit+aDjyLJmmgvMVuloaMpGHPl4V5iV3BBa563e5JY9xO+gJBwtTb9q7Q8C mdg4xQ1+bqoQpc+gIpw5ks/W1KsdFYl1y8ZZRTzVOQ9kvuq4mogGtVJ4dS/PfMNIH3 q1Qk3HwuKj12Ep3f9iEkAbgFiSF6DWteKE3HQuNBK6n0301E9uMdY5e48cCjb0q9en cBz3CDPb58li7HRkb67AF/RctpON8mZ6M2WcpSfLnE1Hp/QuclXpoedwNIpfQtb034 yVf37SRkLjV4w== From: Christian Brauner Date: Sat, 14 Nov 2026 14:02:07 +0100 Subject: [PATCH RFC v2 26/42] xenfs: use fc_init_pseudo() X-Mailing-List: linux-usb@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Message-Id: <20261114-work-loop-pseudo-v2-26-98639a2286fb@kernel.org> References: <20261114-work-loop-pseudo-v2-0-98639a2286fb@kernel.org> In-Reply-To: <20261114-work-loop-pseudo-v2-0-98639a2286fb@kernel.org> To: 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, "Christian Brauner (Amutable)" X-Mailer: b4 0.17-dev-ce4c1 X-Developer-Signature: v=1; a=openpgp-sha256; l=1019; i=brauner@kernel.org; h=from:subject:message-id; bh=FUjiFAJ818KMfzd+kfIYJM0T6xlI1Tybz/61rTbofEc=; b=owGbwMvMwCU28Zj0gdSKO4sYT6slMWT9iGk2ymq59kHLQ6h8olLRV6eCMAf3indWE33bRHYYG yoaf7zdUcrCIMbFICumyOLQbhIut5ynYrNRpgbMHFYmkCEMXJwCMJEOK4bfbPpa60rvXBGfN9V1 euu+TdOP9GV/muPCcL7yp0X8f6GmCIb/wbNO6i6ubdGYUd+54ZleikWZyucDWjzxvCyT2fm7JCz ZAQ== X-Developer-Key: i=brauner@kernel.org; a=openpgp; fpr=4880B8C9BD0E5106FC070F4F7B3C391EFEA93624 Initialize xenfs as a pseudo filesystem. This raises SB_I_PSEUDO and also SB_I_NOEXEC and SB_I_NODEV. xenfs never holds executables or device nodes. SB_I_NOEXEC also refuses PROT_EXEC mappings. xenfs maps the xenstore page and guest memory through privcmd, both data. Signed-off-by: Christian Brauner (Amutable) --- drivers/xen/xenfs/super.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/xen/xenfs/super.c b/drivers/xen/xenfs/super.c index 37ea7c5c03469..aba7d038ed735 100644 --- a/drivers/xen/xenfs/super.c +++ b/drivers/xen/xenfs/super.c @@ -15,6 +15,7 @@ #include #include #include +#include #include #include @@ -80,6 +81,7 @@ static const struct fs_context_operations xenfs_context_ops = { static int xenfs_init_fs_context(struct fs_context *fc) { + fc_init_pseudo(fc); fc->ops = &xenfs_context_ops; return 0; } -- 2.53.0