From: Olga Kornievskaia <kolga@xxxxxxxxxx> Add a check to disallow cross file systems copy offload, both files are expected to be of NFS4.2+ type. Reviewed-by: Jeff Layton <jlayton@xxxxxxxxxx> Reviewed-by: Matthew Wilcox <willy@xxxxxxxxxxxxx> Signed-off-by: Olga Kornievskaia <kolga@xxxxxxxxxx> --- fs/nfs/nfs4file.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/fs/nfs/nfs4file.c b/fs/nfs/nfs4file.c index 989f174..69e2705 100644 --- a/fs/nfs/nfs4file.c +++ b/fs/nfs/nfs4file.c @@ -142,7 +142,10 @@ static ssize_t nfs4_copy_file_range(struct file *file_in, loff_t pos_in, if (pos_in >= i_size_read(file_inode(file_in))) return -EINVAL; - if (file_inode(file_in)->i_sb != file_inode(file_out)->i_sb) + if (file_in->f_op != &nfs4_file_operations) + return -EXDEV; + + if ((NFS_SERVER(file_inode(file_in)))->nfs_client->cl_minorversion < 2) return -EXDEV; if (file_inode(file_in) == file_inode(file_out)) -- 1.8.3.1
