From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from ipmailnode02.adl6.internode.on.net ([150.101.137.148]:39077 "EHLO ipmailnode02.adl6.internode.on.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725953AbeLCIei (ORCPT ); Mon, 3 Dec 2018 03:34:38 -0500 From: Dave Chinner Subject: [PATCH 09/11] vfs: push copy_file_ranges -EXDEV checks down Date: Mon, 3 Dec 2018 19:34:14 +1100 Message-Id: <20181203083416.28978-10-david@fromorbit.com> In-Reply-To: <20181203083416.28978-1-david@fromorbit.com> References: <20181203083416.28978-1-david@fromorbit.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: linux-unionfs-owner@vger.kernel.org To: linux-fsdevel@vger.kernel.org, linux-xfs@vger.kernel.org Cc: olga.kornievskaia@gmail.com, linux-nfs@vger.kernel.org, linux-unionfs@vger.kernel.org, ceph-devel@vger.kernel.org, linux-cifs@vger.kernel.org List-ID: From: Dave Chinner We want to enable cross-filesystem copy_file_range functionality where possible, so push the "same superblock only" checks down to the individual filesystem callouts so they can make their own decisions about cross-superblock copy offload. Signed-off-by: Dave Chinner --- fs/ceph/file.c | 4 +++- fs/cifs/cifsfs.c | 8 +++++++- fs/fuse/file.c | 5 ++++- fs/nfs/nfs4file.c | 16 ++++++++++------ fs/overlayfs/file.c | 10 +++++++++- fs/read_write.c | 10 ++++------ 6 files changed, 37 insertions(+), 16 deletions(-) diff --git a/fs/ceph/file.c b/fs/ceph/file.c index cf29f0410dcb..eb876e19c1dc 100644 --- a/fs/ceph/file.c +++ b/fs/ceph/file.c @@ -1905,6 +1905,8 @@ static ssize_t __ceph_copy_file_range(struct file *src_file, loff_t src_off, if (src_inode == dst_inode) return -EINVAL; + if (src_inode->i_sb != dst_inode->i_sb) + return -EXDEV; if (ceph_snap(dst_inode) != CEPH_NOSNAP) return -EROFS; @@ -2105,7 +2107,7 @@ static ssize_t ceph_copy_file_range(struct file *src_file, loff_t src_off, ret = __ceph_copy_file_range(src_file, src_off, dst_file, dst_off, len, flags); - if (ret == -EOPNOTSUPP) + if (ret == -EOPNOTSUPP || ret == -EXDEV) ret = generic_copy_file_range(src_file, src_off, dst_file, dst_off, len, flags); return ret; diff --git a/fs/cifs/cifsfs.c b/fs/cifs/cifsfs.c index 5ef4baec6234..03e4b9eacbd1 100644 --- a/fs/cifs/cifsfs.c +++ b/fs/cifs/cifsfs.c @@ -1072,6 +1072,12 @@ ssize_t cifs_file_copychunk_range(unsigned int xid, goto out; } + if (src_inode->i_sb != target_inode->i_sb) { + rc = -EXDEV; + goto out; + } + + if (!src_file->private_data || !dst_file->private_data) { rc = -EBADF; cifs_dbg(VFS, "missing cifsFileInfo on copy range src file\n"); @@ -1142,7 +1148,7 @@ static ssize_t cifs_copy_file_range(struct file *src_file, loff_t off, len, flags); free_xid(xid); - if (rc == -EOPNOTSUPP) + if (rc == -EOPNOTSUPP || rc == -EXDEV) rc = generic_copy_file_range(src_file, off, dst_file, destoff, len, flags); return rc; diff --git a/fs/fuse/file.c b/fs/fuse/file.c index b86fb0298739..0758f831a4eb 100644 --- a/fs/fuse/file.c +++ b/fs/fuse/file.c @@ -3053,6 +3053,9 @@ static ssize_t __fuse_copy_file_range(struct file *file_in, loff_t pos_in, if (fc->no_copy_file_range) return -EOPNOTSUPP; + if (file_inode(file_in)->i_sb != file_inode(file_out)->i_sb) + return -EXDEV; + inode_lock(inode_out); if (fc->writeback_cache) { @@ -3109,7 +3112,7 @@ static ssize_t fuse_copy_file_range(struct file *src_file, loff_t src_off, ret = __fuse_copy_file_range(src_file, src_off, dst_file, dst_off, len, flags); - if (ret == -EOPNOTSUPP) + if (ret == -EOPNOTSUPP || ret == -EXDEV) ret = generic_copy_file_range(src_file, src_off, dst_file, dst_off, len, flags); return ret; diff --git a/fs/nfs/nfs4file.c b/fs/nfs/nfs4file.c index d7766a6eb0f4..4783c0c1c49e 100644 --- a/fs/nfs/nfs4file.c +++ b/fs/nfs/nfs4file.c @@ -133,16 +133,20 @@ static ssize_t nfs4_copy_file_range(struct file *file_in, loff_t pos_in, struct file *file_out, loff_t pos_out, size_t count, unsigned int flags) { - ssize_t ret; + ssize_t ret = -EXDEV; if (file_inode(file_in) == file_inode(file_out)) return -EINVAL; -retry: - ret = nfs42_proc_copy(file_in, pos_in, file_out, pos_out, count); - if (ret == -EAGAIN) - goto retry; - if (ret == -EOPNOTSUPP) + /* only offload copy if superblock is the same */ + if (file_inode(file_in)->i_sb == file_inode(file_out)->i_sb) { + do { + ret = nfs42_proc_copy(file_in, pos_in, file_out, + pos_out, count); + } while (ret == -EAGAIN); + } + + if (ret == -EOPNOTSUPP || ret == -EXDEV) ret = generic_copy_file_range(file_in, pos_in, file_out, pos_out, count, flags); return ret; diff --git a/fs/overlayfs/file.c b/fs/overlayfs/file.c index 68736e5d6a56..34fb0398d016 100644 --- a/fs/overlayfs/file.c +++ b/fs/overlayfs/file.c @@ -443,6 +443,14 @@ static loff_t ovl_copyfile(struct file *file_in, loff_t pos_in, const struct cred *old_cred; loff_t ret; + /* + * Temporary. Cross device copy checks should be left to the copy file + * call on the real inodes, but existing behaviour checks the upper + * files only. + */ + if (file_inode(file_in)->i_sb != file_inode(file_out)->i_sb) + return -EXDEV; + ret = ovl_real_fdget(file_out, &real_out); if (ret) return ret; @@ -491,7 +499,7 @@ static ssize_t ovl_copy_file_range(struct file *file_in, loff_t pos_in, ret = ovl_copyfile(file_in, pos_in, file_out, pos_out, len, flags, OVL_COPY); - if (ret == -EOPNOTSUPP) + if (ret == -EOPNOTSUPP || ret == -EXDEV) ret = generic_copy_file_range(file_in, pos_in, file_out, pos_out, len, flags); return ret; diff --git a/fs/read_write.c b/fs/read_write.c index 174cf92eea1d..4e0666de0d69 100644 --- a/fs/read_write.c +++ b/fs/read_write.c @@ -1565,6 +1565,10 @@ ssize_t generic_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) { + /* Temporary, do_splice_direct supports cross-sb copies */ + if (file_inode(file_in)->i_sb != file_inode(file_out)->i_sb) + return -EXDEV; + return do_splice_direct(file_in, &pos_in, file_out, &pos_out, len > MAX_RW_COUNT ? MAX_RW_COUNT : len, 0); } @@ -1611,17 +1615,11 @@ ssize_t vfs_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) { - struct inode *inode_in = file_inode(file_in); - struct inode *inode_out = file_inode(file_out); ssize_t ret; if (flags != 0) return -EINVAL; - /* this could be relaxed once a method supports cross-fs copies */ - if (inode_in->i_sb != inode_out->i_sb) - return -EXDEV; - ret = generic_copy_file_checks(file_in, pos_in, file_out, pos_out, &len, flags); if (ret < 0) -- 2.19.1