From: Andy Adamson <andros@xxxxxxxxxx>
Signed-off-by: Andy Adamson <andros@xxxxxxxxxx>
---
fs/nfs/nfs4file.c | 15 +++++++++++++++
1 file changed, 15 insertions(+)
diff --git a/fs/nfs/nfs4file.c b/fs/nfs/nfs4file.c
index cc3353a..7c6f651 100644
--- a/fs/nfs/nfs4file.c
+++ b/fs/nfs/nfs4file.c
@@ -136,6 +136,21 @@ 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, int flags)
{
+ struct inode *in_inode = file_inode(file_in);
+ struct inode *out_inode = file_inode(file_out);
+ int ret;
+
+ if (in_inode == out_inode)
+ return -EINVAL;
+
+ /* flush any pending writes */
+ ret = nfs_sync_inode(in_inode);
+ if (ret)
+ return ret;
+ ret = nfs_sync_inode(out_inode);
+ if (ret)
+ return ret;
+
return nfs42_proc_copy(file_in, pos_in, file_out, pos_out, count);
}
--
1.8.3.1
--
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