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[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-unionfs@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