smb: fix bytes written value in /proc/fs/cifs/Stats

[ Upstream commit 92941c7f2c9529fac1b2670482d0ced3b46eac70 ]

With recent netfs apis changes, the bytes written
value was not getting updated in /proc/fs/cifs/Stats.
Fix this by updating tcon->bytes in write operations.

Fixes: 3ee1a1fc39 ("cifs: Cut over to using netfslib")
Signed-off-by: Bharath SM <bharathsm@microsoft.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

fs/smb/client/smb2pdu.c

@@ -4855,6 +4855,8 @@ smb2_writev_callback(struct mid_q_entry *mid)
 		if (written > wdata->subreq.len)
 			written &= 0xFFFF;
 
+		cifs_stats_bytes_written(tcon, written);
+
 		if (written < wdata->subreq.len)
 			wdata->result = -ENOSPC;
 		else
@@ -5171,6 +5173,7 @@ replay_again:
 		cifs_dbg(VFS, "Send error in write = %d\n", rc);
 	} else {
 		*nbytes = le32_to_cpu(rsp->DataLength);
+		cifs_stats_bytes_written(io_parms->tcon, *nbytes);
 		trace_smb3_write_done(0, 0, xid,
 				      req->PersistentFileId,
 				      io_parms->tcon->tid,