[CIFS] CIFS Stats improvements

New cifs_writepages routine was not updated bytes written in cifs stats.
Also added ability to clear /proc/fs/cifs/Stats by writing (0 or 1) to it.
Signed-off-by: Steve French <sfrench@us.ibm.com>

1 files changed, 3 insertions, 0 deletions

diff --git a/fs/cifs/file.c b/fs/cifs/file.c
index 11806c879c47..585a62aebd59 100644
--- a/fs/cifs/file.c
+++ b/fs/cifs/file.c
@@ -1153,6 +1153,9 @@ retry:
                                           rc, bytes_written));
                                 set_bit(AS_EIO, &mapping->flags);
                                 SetPageError(page);
+                        } else {
+                                cifs_stats_bytes_written(cifs_sb->tcon,
+                                                         bytes_written);
                         }
                         for (i = 0; i < n_iov; i++) {
                                 page = pvec.pages[first + i];