From patchwork Sun Oct 6 10:00:39 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: =?utf-8?q?Pali_Roh=C3=A1r?= X-Patchwork-Id: 13823719 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id AF2D1175D5C; Sun, 6 Oct 2024 10:01:11 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1728208871; cv=none; b=r2psmbgKjxS+FfF/WkGviwTeKH6lIeR+afrRWE0QBn/tC8OXRaDkK+xIYTKkzRvAzlOOHj3Tz5QN1DMGBoHSf0lGL+2uIivgdSAotF9lVwSCWYBsMVCzWM2vO9izBM91JLVnCizWsIJy/gOI8oZVD5zdzoqVekKiv1au/zmisw0= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1728208871; c=relaxed/simple; bh=nDcqMOmHhs7STNbH0Ot5sUT4vs+zoNhL3T3tE+/I+JA=; h=From:To:Cc:Subject:Date:Message-Id:MIME-Version:Content-Type; b=aXwPYZWgJjjulIP3DZpCCZ4NhFbCR4enibOlX01n1qI09DzscOVjlOINJhCMyAYBC01eJ2+l4/KESZb4jr777xleiKA8vfI7QJFJxPxQP6sj1/71wqd6mNX4LXJjSEnhUqcqmFqlbSpckuEwfnY/yagtFV9FXNP/mlk0pmZLXqs= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=PaBIQk+m; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="PaBIQk+m" Received: by smtp.kernel.org (Postfix) with ESMTPSA id E282AC4CECF; Sun, 6 Oct 2024 10:01:10 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1728208871; bh=nDcqMOmHhs7STNbH0Ot5sUT4vs+zoNhL3T3tE+/I+JA=; h=From:To:Cc:Subject:Date:From; b=PaBIQk+m9qCRhv6wm/h55UfuuZKI3SIkZ43/NFKcwWt3Y5+YEOmLEk+cwqd4gsZmN Hm8GJMc5GzXSC7C+vGpSF4l3ZhBttHYI9kg+sgdCW55ipraX1H13BkpzV32uH1SIAA ITjVTVyLOx4b2TlhDH6vn67Iqei5O44QKziWIpHIS+yNlbWn2Z42TInoGK27op1Wwj 24zCP4TkoG6xtRPvszPfLIYPUYSmhePUC2gtmplsnZgKZSBkEi8WJX7EvelPXv90B2 Ixx4kGHdKSG9IPJPT6KUzVL9+PrkLS0KV+bQOPLSAbdv6Nc1JKv5wzGGpkjyJhlLWZ sMxRaJh4LAAuw== Received: by pali.im (Postfix) id F119C81A; Sun, 6 Oct 2024 12:01:01 +0200 (CEST) From: =?utf-8?q?Pali_Roh=C3=A1r?= To: Steve French , Paulo Alcantara , Ronnie Sahlberg Cc: linux-cifs@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH 0/7] cifs: Improve mount option -o reparse and support for native Windows sockets Date: Sun, 6 Oct 2024 12:00:39 +0200 Message-Id: <20241006100046.30772-1-pali@kernel.org> X-Mailer: git-send-email 2.39.5 Precedence: bulk X-Mailing-List: linux-cifs@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 This patch series improves choosing reparse format when creating new special files. In following table is behavior of creating new special files before this patch series. In columns are mount options, in rows are file types and in each cell is reparse format which is created. -o reparse=default -o reparse=nfs -o reparse=wsl symlink native native native socket nfs nfs wsl fifo nfs nfs wsl block nfs nfs wsl char nfs nfs wsl After this patch series the table looks like: -o reparse=default -o reparse=nfs -o reparse=wsl -o reparse=native+nfs -o reparse=native+wsl -o reparse=native -o reparse=none symlink native nfs wsl native native native -disallowed- socket native nfs wsl native native native -disallowed- fifo nfs nfs wsl nfs wsl -disallowed- -disallowed- block nfs nfs wsl nfs wsl -disallowed- -disallowed- char nfs nfs wsl nfs wsl -disallowed- -disallowed- The default behavior when no option is specified (which is same as -o reparse=default) changes only for creating new sockets which are now created in its native NTFS form with IO_REPARSE_TAG_AF_UNIX reparse tag. The nfs and wsl behavior is changed to always create new special files in its own formats. There are new options native+nfs and native+wsl which creates by default in native form (symlinks + sockets) and fallbacks to nfs/wsl for other types (fifo, char, block). This is probably the most useful for interoperability. Mount option -o reparse=default is now same as -o reparse=native+nfs For completeness there are also new options -o reparse=native which allows to creating only native types used by Windows applications (symlinks and sockets) and option -o reparse=none to completely disable creating new reparse points. Pali Rohár (7): cifs: Add mount option -o reparse=native cifs: Add mount option -o reparse=none cifs: Add support for creating native Windows sockets cifs: Add support for creating NFS-style symlinks cifs: Improve guard for excluding $LXDEV xattr cifs: Add support for creating WSL-style symlinks cifs: Validate content of WSL reparse point buffers fs/smb/client/cifsglob.h | 18 +++- fs/smb/client/fs_context.c | 16 +++ fs/smb/client/fs_context.h | 4 + fs/smb/client/reparse.c | 211 +++++++++++++++++++++++++++++++------ fs/smb/client/reparse.h | 2 + 5 files changed, 218 insertions(+), 33 deletions(-)