From: Dave Chinner <david@fromorbit.com>
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
Subject: [PATCH 09/11] vfs: push copy_file_ranges -EXDEV checks down
Date: Mon, 3 Dec 2018 19:34:14 +1100 [thread overview]
Message-ID: <20181203083416.28978-10-david@fromorbit.com> (raw)
In-Reply-To: <20181203083416.28978-1-david@fromorbit.com>
From: Dave Chinner <dchinner@redhat.com>
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 <dchinner@redhat.com>
---
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
next prev parent reply other threads:[~2018-12-03 8:34 UTC|newest]
Thread overview: 83+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-12-03 8:34 [PATCH 0/11] fs: fixes for major copy_file_range() issues Dave Chinner
2018-12-03 8:34 ` [PATCH 01/11] vfs: copy_file_range source range over EOF should fail Dave Chinner
2018-12-03 12:46 ` Amir Goldstein
2018-12-04 15:13 ` Christoph Hellwig
2018-12-04 21:29 ` Dave Chinner
2018-12-04 21:47 ` Olga Kornievskaia
2018-12-04 22:31 ` Dave Chinner
2018-12-05 16:51 ` J. Bruce Fields
2019-05-20 9:10 ` Amir Goldstein
2019-05-20 13:12 ` Olga Kornievskaia
2019-05-20 13:36 ` Amir Goldstein
2019-05-20 13:58 ` Olga Kornievskaia
2019-05-20 14:02 ` Amir Goldstein
2018-12-05 14:12 ` Christoph Hellwig
2018-12-05 21:08 ` Dave Chinner
2018-12-05 21:30 ` Christoph Hellwig
2018-12-03 8:34 ` [PATCH 02/11] vfs: introduce generic_copy_file_range() Dave Chinner
2018-12-03 10:03 ` Amir Goldstein
2018-12-03 23:00 ` Dave Chinner
2018-12-04 15:14 ` Christoph Hellwig
2018-12-03 8:34 ` [PATCH 03/11] vfs: no fallback for ->copy_file_range Dave Chinner
2018-12-03 10:22 ` Amir Goldstein
2018-12-03 23:02 ` Dave Chinner
2018-12-06 4:16 ` Amir Goldstein
2018-12-06 21:30 ` Dave Chinner
2018-12-07 5:38 ` Amir Goldstein
2018-12-03 18:23 ` Anna Schumaker
2018-12-04 15:16 ` Christoph Hellwig
2018-12-03 8:34 ` [PATCH 04/11] vfs: add missing checks to copy_file_range Dave Chinner
2018-12-03 12:42 ` Amir Goldstein
2018-12-03 19:04 ` Darrick J. Wong
2018-12-03 21:33 ` Olga Kornievskaia
2018-12-03 23:04 ` Dave Chinner
2018-12-04 15:18 ` Christoph Hellwig
2018-12-12 11:31 ` Luis Henriques
2018-12-12 16:42 ` Darrick J. Wong
2018-12-12 18:55 ` Olga Kornievskaia
2018-12-12 19:42 ` Matthew Wilcox
2018-12-12 20:22 ` Olga Kornievskaia
2018-12-13 10:29 ` Luis Henriques
2018-12-03 8:34 ` [PATCH 05/11] vfs: use inode_permission in copy_file_range() Dave Chinner
2018-12-03 12:47 ` Amir Goldstein
2018-12-03 18:18 ` Darrick J. Wong
2018-12-03 23:55 ` Dave Chinner
2018-12-05 17:28 ` J. Bruce Fields
2018-12-03 18:53 ` Eric Biggers
2018-12-04 15:19 ` Christoph Hellwig
2018-12-03 8:34 ` [PATCH 06/11] vfs: copy_file_range needs to strip setuid bits Dave Chinner
2018-12-03 12:51 ` Amir Goldstein
2018-12-04 15:21 ` Christoph Hellwig
2018-12-03 8:34 ` [PATCH 07/11] vfs: copy_file_range should update file timestamps Dave Chinner
2018-12-03 10:47 ` Amir Goldstein
2018-12-03 17:33 ` Olga Kornievskaia
2018-12-03 18:22 ` Darrick J. Wong
2018-12-03 23:19 ` Dave Chinner
2018-12-04 15:24 ` Christoph Hellwig
2018-12-03 8:34 ` [PATCH 08/11] vfs: push EXDEV check down into ->remap_file_range Dave Chinner
2018-12-03 11:04 ` Amir Goldstein
2018-12-03 19:11 ` Darrick J. Wong
2018-12-03 23:37 ` Dave Chinner
2018-12-03 23:58 ` Darrick J. Wong
2018-12-04 9:17 ` Amir Goldstein
2018-12-03 23:34 ` Dave Chinner
2018-12-03 18:24 ` Darrick J. Wong
2018-12-04 8:18 ` Olga Kornievskaia
2018-12-03 8:34 ` Dave Chinner [this message]
2018-12-03 12:36 ` [PATCH 09/11] vfs: push copy_file_ranges -EXDEV checks down Amir Goldstein
2018-12-03 17:58 ` Olga Kornievskaia
2018-12-03 18:53 ` Anna Schumaker
2018-12-03 19:27 ` Olga Kornievskaia
2018-12-03 23:40 ` Dave Chinner
2018-12-04 15:43 ` Christoph Hellwig
2018-12-04 22:18 ` Dave Chinner
2018-12-04 23:33 ` Olga Kornievskaia
2018-12-05 14:09 ` Christoph Hellwig
2018-12-05 17:01 ` Olga Kornievskaia
2018-12-03 8:34 ` [PATCH 10/11] vfs: allow generic_copy_file_range to copy across devices Dave Chinner
2018-12-03 12:54 ` Amir Goldstein
2018-12-03 8:34 ` [PATCH 11/11] ovl: allow cross-device copy_file_range calls Dave Chinner
2018-12-03 12:55 ` Amir Goldstein
2018-12-03 8:39 ` [PATCH 12/11] man-pages: copy_file_range updates Dave Chinner
2018-12-03 13:05 ` Amir Goldstein
2019-05-21 5:52 ` Amir Goldstein
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