From: Steve French <stfrench@microsoft.com>
Date: Tue, 12 Mar 2019 01:29:03 -0500
Subject: [PATCH] smb3: display volume serial number for shares in
 /proc/fs/cifs/DebugData
Git-commit: ab7b10cf4fd14496292c62099f3a0a1c1ef90c0e
Patch-mainline: v5.1-rc1
References: bsc#1144333

It can be helpful for debugging.  According to MS-FSCC:

"A 32-bit unsigned integer that contains the serial number of the
volume. The serial number is an opaque value generated by the file
system at format time"

Signed-off-by: Steve French <stfrench@microsoft.com>
Acked-by: Pavel Shilovsky <pshilov@microsoft.com>
Acked-by: Aurelien Aptel <aaptel@suse.com>
---
 fs/cifs/cifs_debug.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/fs/cifs/cifs_debug.c b/fs/cifs/cifs_debug.c
index faeb1452cc2d..13c1288b04a7 100644
--- a/fs/cifs/cifs_debug.c
+++ b/fs/cifs/cifs_debug.c
@@ -115,6 +115,9 @@ static void cifs_debug_tcon(struct seq_file *m, struct cifs_tcon *tcon)
 		seq_puts(m, " type: CDROM ");
 	else
 		seq_printf(m, " type: %d ", dev_type);
+
+	seq_printf(m, "Serial Number: 0x%x", tcon->vol_serial_number);
+
 	if ((tcon->seal) ||
 	    (tcon->ses->session_flags & SMB2_SESSION_FLAG_ENCRYPT_DATA) ||
 	    (tcon->share_flags & SHI1005_FLAGS_ENCRYPT_DATA))
-- 
2.16.4