NFS: Account for NFS bytes read via the splice API

Bytes read via the splice API should be accounted for in the NFS
performance statistics.

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>

diff --git a/fs/nfs/file.c b/fs/nfs/file.c
index 7f4910c..abbc202 100644 (file)
--- a/fs/nfs/file.c
+++ b/fs/nfs/file.c
@@ -284,8 +284,11 @@ nfs_file_splice_read(struct file *filp, loff_t *ppos,
                (unsigned long) count, (unsigned long long) *ppos);
 
        res = nfs_revalidate_mapping(inode, filp->f_mapping);
-       if (!res)
+       if (!res) {
                res = generic_file_splice_read(filp, ppos, pipe, count, flags);
+               if (res > 0)
+                       nfs_add_stats(inode, NFSIOS_NORMALREADBYTES, res);
+       }
        return res;
 }