From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-qt1-f176.google.com (mail-qt1-f176.google.com [209.85.160.176]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 57CF839CD10 for ; Wed, 2 Sep 2026 19:34:55 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.160.176 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1788377708; cv=none; b=lgKVlPz85iNw84EgIM+O1HmCxZtmLwWuQRWn2gKR282P5MMW9Jhkjt0gayWTP1xiQVohbjV4MB3YHK+A3rI7DZVoG8eEPCBM1CYTnA5hXaj5HxmyoZL1z9noH6g1fgG7+RNyuASfKajsHcaU+p+7bd8h6o1TlCggHuWdpdbEd1k= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1788377708; c=relaxed/simple; bh=3WGPUky1hmwDKOIR30PGoglOqPg/CfPHhhz1D/WGWTI=; h=Date:Message-ID:MIME-Version:Content-Type:From:To:Cc:Subject: References:In-Reply-To; b=ioLXWIo3txij7d6xF272/bQN0H8QPamPyshFrBafAki137sForbpS2+kFQ9CtuE2jIp6R5oJPjT4cmMVK8QV46dt1U1gZLRzTX4a8jhLKKVCqfYgllazA1NxJyRBaj5jeyrk6vaeMJ29GcwyFLVghEMqiG464PmviGm6pz93dbw= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=paul-moore.com; spf=pass smtp.mailfrom=paul-moore.com; dkim=pass (2048-bit key) header.d=paul-moore.com header.i=@paul-moore.com header.b=dA1yL4xF; arc=none smtp.client-ip=209.85.160.176 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=paul-moore.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=paul-moore.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=paul-moore.com header.i=@paul-moore.com header.b="dA1yL4xF" Received: by mail-qt1-f176.google.com with SMTP id d75a77b69052e-5304310b3e0so3009881cf.3 for ; Wed, 02 Sep 2026 12:34:54 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=paul-moore.com; s=google; t=1788377689; x=1788982489; darn=vger.kernel.org; h=in-reply-to:references:subject:cc:to:from:content-transfer-encoding :content-type:mime-version:message-id:date:from:to:cc:subject:date :message-id:reply-to:content-type; bh=tTllqewIXAY5+sR//IBZWAZfUENL/NuhQCFU0zl+dm8=; b=dA1yL4xFmI/xLm4gRSWgFben1ST4myVImRVF3JDQcxKkV0fYD1Ntg9aKbmMS+Z+l78 1/PWPbsjSZySmLHZideqKf+2aZzOLMAX9z2/84wXgSVlWbAm5hXDMv9KcEjc/puDweL3 S6hUENsBnMQqsWYW9wDYNaFFFD1w8xhepjmDHisqycyUmz76aqSpxZvHM4OwoAAiQvlw 62c4LWA0DWUYE6qqfOJzANDT6279+eDBPO0QC5/KDtprAIrbEoN2zG0aTCWDkC8nh72q TxsRBcE/AJeHtQGYCav2Fm3C30T4flhV5XQnCvzHynsxo+HzPMRVXjx9/tNF0MFsGTZa 6OEA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1788377689; x=1788982489; h=in-reply-to:references:subject:cc:to:from:content-transfer-encoding :content-type:mime-version:message-id:date:x-gm-gg :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to :content-type; bh=tTllqewIXAY5+sR//IBZWAZfUENL/NuhQCFU0zl+dm8=; b=by5I33bGm1nVt91R1fbpZUHiT+gsXnRZWQR2ajFuOflu7wzRByuCy0WcesfwRSGjtW VayhMOa62jmhQBcSGwd5hT3es9rKHInqW/YuTE8epq7htNndry6oehvapkndTvgajGTR SgpSl6s1rNx4MmiOjJkZZG1kxYUu76FT9kuPNR1VngKcrLaKzQ4kspoFuCa3ZHiBjm+o BHK0bAKzQgOALVbECLQnDZCBXecCHvJOrqwfD2OZbWAOrzTzgLuiYH6ANzBUyyO0f+/W hqtHRI61EUq0jqgb9EuNvlOD+pxMq2Jvfk/fYazFAH8oPdpnY2aKEDWfiHCTwn7UZQLZ ddGw== X-Forwarded-Encrypted: i=1; AKwUvBzirBjvnRjXPId7JdIbvkx6zChsWMxCFKdqSzsvhKpF5+9VUrOqu36505wl3GuDHh6TGj3zhpwOlb9S@vger.kernel.org X-Gm-Message-State: AFuF++m0MGQylpuNCTsqbWDKcNrKZS6czCfkkwQUjSz9p2Rh4h5+csPA GgZUmTzT2QwL15PKYHrZOUBshOxQF55IpFhun3E+oF+tMJLGIS2qF6zo0iNDJtAq4g== X-Gm-Gg: AYBFou1Tdo3fuKFPvEX+Roqj5k5zk8ty6PX056EXsoZBWuZ13WEQ4AnWWLkXcZwKe7H KQpJChdRRRYLt251Bpffkn12LZlWGro3Nic7a567XjriZ+QK/I+anmLczmB0beeCfz650t8DZds aU0JKxzNdmau8UXToaS6VqyOAvPj3bYkwl2f5ss4408lYG0uHrFB150AxRRuevZ4UG2POz+bUKC LIi4q8Ffjf+zYJmfAE+cpWdf50dzlZwktcrhKkW9nKd4/tybxAe8ewQjfyVvNgkhGM7HgWmqvp/ FCUX4N23JiiBr0GV+m4vtMXcNkLgk/Jao9glQlnF5YuXzEhxD/qqIPGmoyJ8WENResvOUERoRDk 6BFpG5Vn7QL2H/SlQBtarRLT1nWB1WkKL7eXY8cw9MVqcyp8ErggmYs2/+Jp/+56W7mGqvoezN2 Z1RNx7Tan8q858t5fvVK1+zxU3lh8p3SKBlYwZlK0Y04UgORxFQXHVfHINi1mGkkKWWGNbUuI5j 7haBnvbkTM1q5zI60yI2etz7V/loVv8xA== X-Received: by 2002:a05:622a:1f8d:b0:51b:f25c:2896 with SMTP id d75a77b69052e-53036bfdbebmr93564831cf.11.1788377688931; Wed, 02 Sep 2026 12:34:48 -0700 (PDT) Received: from localhost (pool-71-126-255-178.bstnma.fios.verizon.net. [71.126.255.178]) by smtp.gmail.com with ESMTPSA id d75a77b69052e-53033252530sm25672391cf.28.2026.09.02.12.34.48 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 02 Sep 2026 12:34:48 -0700 (PDT) Date: Wed, 02 Sep 2026 15:34:47 -0400 Message-ID: <4bcb6be827e73a667592e7110ba78682@paul-moore.com> Precedence: bulk X-Mailing-List: linux-cifs@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-Mailer: pstg-pwork:20260902_1319/pstg-lib:20260901_1604/pstg-pwork:20260902_1319 From: Paul Moore To: Christian Brauner , linux-fsdevel@vger.kernel.org Cc: Alexander Viro , Jan Kara , Christoph Hellwig , Seth Forshee , linux-security-module@vger.kernel.org, Mimi Zohar , linux-integrity@vger.kernel.org, Ilya Dryomov , ceph-devel@vger.kernel.org, Carlos Maiolino , linux-xfs@vger.kernel.org, Miklos Szeredi , Amir Goldstein , linux-unionfs@vger.kernel.org, Namjae Jeon , linux-cifs@vger.kernel.org, linux-kernel@vger.kernel.org, "Christian Brauner (Amutable)" Subject: Re: [PATCH 12/27] fs: port ->permission() to pass const mnt_idmap References: <20260901-work-idmap-const-v1-12-54ccd48e100b@kernel.org> In-Reply-To: <20260901-work-idmap-const-v1-12-54ccd48e100b@kernel.org> On Sep 1, 2026 Christian Brauner wrote: > > Convert to const struct mnt_idmap. > > A mount's idmapping is immutable. The only thing that is allowed to be > modified afterwards is the reference count and that is hidden behind > mnt_idmap_get() and mnt_idmap_put(). Everything else only ever reads > from the idmapping. This is the same model that struct cred uses and the > idmapping is also rather sensitive. > > So make the idmap argument const wherever we can. The conversion is done > from the bottom up so callers can continue to pass a non-const pointer > to a const parameter until the conversion is finished. > > No functional changes. > > Signed-off-by: Christian Brauner (Amutable) > Reviewed-by: Jan Kara > --- > Documentation/filesystems/locking.rst | 2 +- > Documentation/filesystems/vfs.rst | 2 +- > fs/afs/internal.h | 2 +- > fs/afs/security.c | 2 +- > fs/attr.c | 2 +- > fs/autofs/root.c | 4 ++-- > fs/bad_inode.c | 2 +- > fs/btrfs/inode.c | 2 +- > fs/btrfs/ioctl.c | 2 +- > fs/ceph/inode.c | 2 +- > fs/ceph/super.h | 2 +- > fs/coda/coda_linux.h | 2 +- > fs/coda/dir.c | 2 +- > fs/coda/pioctl.c | 4 ++-- > fs/ecryptfs/inode.c | 2 +- > fs/failfs.c | 2 +- > fs/fuse/dir.c | 2 +- > fs/gfs2/inode.c | 2 +- > fs/gfs2/inode.h | 2 +- > fs/hostfs/hostfs_kern.c | 2 +- > fs/internal.h | 2 +- > fs/kernfs/inode.c | 2 +- > fs/kernfs/kernfs-internal.h | 2 +- > fs/namei.c | 22 +++++++++++----------- > fs/nfs/dir.c | 2 +- > fs/nilfs2/inode.c | 2 +- > fs/nilfs2/nilfs.h | 2 +- > fs/ocfs2/file.c | 2 +- > fs/ocfs2/file.h | 2 +- > fs/orangefs/inode.c | 2 +- > fs/orangefs/orangefs-kernel.h | 2 +- > fs/overlayfs/inode.c | 2 +- > fs/overlayfs/overlayfs.h | 2 +- > fs/proc/base.c | 4 ++-- > fs/proc/fd.c | 4 ++-- > fs/proc/fd.h | 2 +- > fs/proc/proc_sysctl.c | 2 +- > fs/smb/client/cifsfs.c | 2 +- > fs/smb/server/vfs.c | 2 +- > fs/smb/server/vfs.h | 2 +- > fs/tracefs/inode.c | 2 +- > include/linux/fs.h | 8 ++++---- > include/linux/nfs_fs.h | 2 +- > security/selinux/selinuxfs.c | 2 +- > 44 files changed, 61 insertions(+), 61 deletions(-) Acked-by: Paul Moore (SELinux) -- paul-moore.com