From 8dff1df551dffc29fa78771c8dda2f0b094003aa Mon Sep 17 00:00:00 2001 From: Olga Kornievskaia Date: Tue, 2 Jul 2019 15:11:48 -0400 Subject: [PATCH] NFS: replace cross device check in copy_file_range Add a check to disallow cross file systems copy offload, both files are expected to be of NFS4.2+ type. Reviewed-by: Jeff Layton Reviewed-by: Matthew Wilcox Signed-off-by: Olga Kornievskaia --- fs/nfs/nfs4file.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/fs/nfs/nfs4file.c b/fs/nfs/nfs4file.c index 897832564923..e97813b15e23 100644 --- a/fs/nfs/nfs4file.c +++ b/fs/nfs/nfs4file.c @@ -141,7 +141,7 @@ static ssize_t __nfs4_copy_file_range(struct file *file_in, loff_t pos_in, bool sync = false; /* Only offload copy if superblock is the same */ - 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_capable(file_inode(file_out), NFS_CAP_COPY)) return -EOPNOTSUPP;