From: Olga Kornievskaia <kolga@xxxxxxxxxx>
VFS copy_file_range was relaxed to allow for cross-device copy.
Add a check to disallow cross file systems copy offload, both
files are expected to be of NFS type.
Signed-off-by: Olga Kornievskaia <kolga@xxxxxxxxxx>
---
fs/nfs/nfs4file.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/fs/nfs/nfs4file.c b/fs/nfs/nfs4file.c
index 4288a6e..7137e7b 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_in->f_inode->i_sb->s_type != file_out->f_inode->i_sb->s_type)
+ return -EXDEV;
+
if (file_inode(file_in) == file_inode(file_out))
return -EINVAL;
retry:
--
1.8.3.1
