From patchwork Mon Oct 29 17:40:48 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Olga Kornievskaia X-Patchwork-Id: 10659873 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id E5FD214E2 for ; Mon, 29 Oct 2018 17:41:07 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id DCAD129B43 for ; Mon, 29 Oct 2018 17:41:07 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id D049A29BCB; Mon, 29 Oct 2018 17:41:07 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-8.0 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FROM,MAILING_LIST_MULTI,RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 5FC5B29C79 for ; Mon, 29 Oct 2018 17:41:07 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728031AbeJ3Cam (ORCPT ); Mon, 29 Oct 2018 22:30:42 -0400 Received: from mail-qt1-f193.google.com ([209.85.160.193]:46097 "EHLO mail-qt1-f193.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728004AbeJ3Cam (ORCPT ); Mon, 29 Oct 2018 22:30:42 -0400 Received: by mail-qt1-f193.google.com with SMTP id c16-v6so10199004qtj.13; Mon, 29 Oct 2018 10:41:05 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id:in-reply-to:references; bh=9lAlqN+j+Y3ZP3kLPXFjqSw7+B+XDWQsPDWf/5AdShk=; b=b6xKsIrZLADWbVQgQy5DUaRttKH5r3Eb9IPakxxosU0h1nqHL3ufnXS5PpWf0TR1dR LPQbIbNxQC2BwPtFv6wisZCHIVIbtujtWw+JdP1ML1xdgPE+L9N6OPAxVgEdKzsIP6GI cWNd8uG2eaB27HPX7JNtX1umNDf2hpN4K2wiET1C++LZQufICX200H8LPPZ+Guf0KQ5I sUOGu1T+2MxcUF2nGhwU9LGQNLz0IKs5Y2N7wvFCYGvEy8v3Ui2TG3Nq/wpVBt/Xyotu quh28Ts8VdkrX6UUF2RiukQumRC4WGDqiRQ81aeMlG5mCCA302jhOoN7tlysvtpKx4BV 8S8A== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references; bh=9lAlqN+j+Y3ZP3kLPXFjqSw7+B+XDWQsPDWf/5AdShk=; b=axdUVS1WXOmQWppqjWj4R2dHDAPtcID8WV3pIcx7HG/Z59mjrCRcfbi80R3s5va+qp Tif6B0osoogsnJ7KDZvBxnEI7TOBM0Wu0jtg+s1jccz8SHRIzK4ft2w5Q5R317T1JC+K PGNR5dgb6+eFmkqGV6Yq0MQ5MY5in5qFJo8QYiIm68not28R8yGz940kJhQSvx6++XEL TIBFZctt37TvNBgIYoITBT6q27YjvSF/oJxNH6ccWhohL7yJtYd+DmXR5sbYVqs9mUoB NTLv3DPai4owc8jVlCB8m/S44Y95HYRQ/zfKQ+BD0SHRmja62kDY5Znf2IejJ1P0a82i OOGg== X-Gm-Message-State: AGRZ1gKkB0V/BN77tAQfI9Awjjuz0JjH88AHXKPZ7XEWpLuTtPGaIuxF VBImxzVaCTg9AC5ucJb/M8Y= X-Google-Smtp-Source: AJdET5c21TvQRjr6TgBxuEgUEGDr3lCcc+0Ue0do2WJZAqMigzkBa6G8U19TvsTfFtPshSr2tmv/DQ== X-Received: by 2002:aed:2b01:: with SMTP id p1-v6mr13967074qtd.118.1540834864648; Mon, 29 Oct 2018 10:41:04 -0700 (PDT) Received: from Olgas-MBP-195.attlocal.net (172-10-226-31.lightspeed.livnmi.sbcglobal.net. [172.10.226.31]) by smtp.gmail.com with ESMTPSA id n190-v6sm13148929qkb.29.2018.10.29.10.41.03 (version=TLS1 cipher=AES128-SHA bits=128/128); Mon, 29 Oct 2018 10:41:03 -0700 (PDT) From: Olga Kornievskaia To: trond.myklebust@hammerspace.com, anna.schumaker@netapp.com, viro@zeniv.linux.org.uk, smfrench@gmail.com, miklos@szeredi.hu Cc: linux-nfs@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-cifs@vger.kernel.org, linux-unionfs@vger.kernel.org, linux-man@vger.kernel.org Subject: [PATCH v5 01/12] VFS: move cross device copy_file_range() check into filesystems Date: Mon, 29 Oct 2018 13:40:48 -0400 Message-Id: <20181029174059.38326-3-olga.kornievskaia@gmail.com> X-Mailer: git-send-email 2.10.1 (Apple Git-78) In-Reply-To: <20181029174059.38326-1-olga.kornievskaia@gmail.com> References: <20181029174059.38326-1-olga.kornievskaia@gmail.com> Sender: linux-cifs-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-cifs@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP From: Olga Kornievskaia This patch makes it the responsibility of individual filesystems to allow or deny cross device copies. Both NFS and CIFS have operations for cross-server copies, and later patches will implement this feature. Note that as of this patch, the copy_file_range() function might be passed superblocks from different filesystem types. -EXDEV should be returned if cross device copies aren't supported. Reviewed-by: Amir Goldstein Reviewed-by: Matthew Wilcox Reviewed-by: Steve French Reviewed-by: Jeff Layton Signed-off-by: Olga Kornievskaia --- Documentation/filesystems/porting | 7 +++++++ fs/cifs/cifsfs.c | 3 +++ fs/nfs/nfs4file.c | 3 +++ fs/overlayfs/file.c | 3 +++ fs/read_write.c | 7 ++----- 5 files changed, 18 insertions(+), 5 deletions(-) diff --git a/Documentation/filesystems/porting b/Documentation/filesystems/porting index 7b7b845..897e1e7 100644 --- a/Documentation/filesystems/porting +++ b/Documentation/filesystems/porting @@ -622,3 +622,10 @@ in your dentry operations instead. alloc_file_clone(file, flags, ops) does not affect any caller's references. On success you get a new struct file sharing the mount/dentry with the original, on failure - ERR_PTR(). +-- +[mandatory] + ->copy_file_range() may now be passed files which belong to two + different superblocks of the same file system type or which belong + to two different filesystems types all together. As before, the + destination's copy_file_range() is the function which is called. + If it cannot copy ranges from the source, it should return -EXDEV. diff --git a/fs/cifs/cifsfs.c b/fs/cifs/cifsfs.c index 7065426..ca8fc87 100644 --- a/fs/cifs/cifsfs.c +++ b/fs/cifs/cifsfs.c @@ -1114,6 +1114,9 @@ static ssize_t cifs_copy_file_range(struct file *src_file, loff_t off, unsigned int xid = get_xid(); ssize_t rc; + if (file_inode(src_file)->i_sb != file_inode(dst_file)->i_sb) + return -EXDEV; + rc = cifs_file_copychunk_range(xid, src_file, off, dst_file, destoff, len, flags); free_xid(xid); diff --git a/fs/nfs/nfs4file.c b/fs/nfs/nfs4file.c index 4288a6e..5a73c90 100644 --- a/fs/nfs/nfs4file.c +++ b/fs/nfs/nfs4file.c @@ -135,6 +135,9 @@ static ssize_t nfs4_copy_file_range(struct file *file_in, loff_t pos_in, { ssize_t ret; + if (file_inode(file_in)->i_sb != file_inode(file_out)->i_sb) + return -EXDEV; + if (file_inode(file_in) == file_inode(file_out)) return -EINVAL; retry: diff --git a/fs/overlayfs/file.c b/fs/overlayfs/file.c index aeaefd2..0331e33 100644 --- a/fs/overlayfs/file.c +++ b/fs/overlayfs/file.c @@ -483,6 +483,9 @@ static ssize_t ovl_copy_file_range(struct file *file_in, loff_t pos_in, struct file *file_out, loff_t pos_out, size_t len, unsigned int flags) { + if (file_inode(file_in)->i_sb != file_inode(file_out)->i_sb) + return -EXDEV; + return ovl_copyfile(file_in, pos_in, file_out, pos_out, len, flags, OVL_COPY); } diff --git a/fs/read_write.c b/fs/read_write.c index 39b4a21..7a912e3 100644 --- a/fs/read_write.c +++ b/fs/read_write.c @@ -1575,10 +1575,6 @@ ssize_t vfs_copy_file_range(struct file *file_in, loff_t pos_in, (file_out->f_flags & O_APPEND)) return -EBADF; - /* this could be relaxed once a method supports cross-fs copies */ - if (inode_in->i_sb != inode_out->i_sb) - return -EXDEV; - if (len == 0) return 0; @@ -1588,7 +1584,8 @@ ssize_t vfs_copy_file_range(struct file *file_in, loff_t pos_in, * Try cloning first, this is supported by more file systems, and * more efficient if both clone and copy are supported (e.g. NFS). */ - if (file_in->f_op->clone_file_range) { + if (inode_in->i_sb == inode_out->i_sb && + file_in->f_op->clone_file_range) { ret = file_in->f_op->clone_file_range(file_in, pos_in, file_out, pos_out, len); if (ret == 0) {