Can be helpful for debugging
Add volume serial number to /proc/fs/cifs/DebugData info on each share e.g.:
Shares:
0) IPC: \\localhost\IPC$ Mounts: 1 DevInfo: 0x0 Attributes: 0x0
PathComponentMax: 0 Status: 1 type: 0 Serial Number: 0x0
Share Capabilities: None Share Flags: 0x0
tid: 0xf13518ce Maximal Access: 0x1f00a9
1) \\localhost\scratch Mounts: 1 DevInfo: 0x20 Attributes: 0x1006f
PathComponentMax: 255 Status: 1 type: DISK Serial Number: 0xd50e5aa0
Share Capabilities: None Aligned, Partition Aligned, Share Flags: 0x0
tid: 0xb792fd24 Optimal sector size: 0x200 Maximal Access: 0x1f01ff
--
Thanks,
Steve
From b6f0b10482ac6d2a1b968b736de5c049c60f8291 Mon Sep 17 00:00:00 2001
From: Steve French <stfrench@xxxxxxxxxxxxx>
Date: Tue, 12 Mar 2019 01:29:03 -0500
Subject: [PATCH] smb3: display volume serial number for shares in
/proc/fs/cifs/DebugData
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@xxxxxxxxxxxxx>
---
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))
--
2.17.1
