linux-kernel - [PATCH 3.12 52/86] CIFS: remove bad_network

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Date:   Thu,  4 May 2017 11:04:17 +0200
From:   Jiri Slaby <jslaby@...e.cz>
To:     stable@...r.kernel.org
Cc:     linux-kernel@...r.kernel.org,
        Germano Percossi <germano.percossi@...rix.com>,
        Steve French <smfrench@...il.com>, Jiri Slaby <jslaby@...e.cz>
Subject: [PATCH 3.12 52/86] CIFS: remove bad_network_name flag

From: Germano Percossi <germano.percossi@...rix.com>

3.12-stable review patch.  If anyone has any objections, please let me know.

===============

commit a0918f1ce6a43ac980b42b300ec443c154970979 upstream.

STATUS_BAD_NETWORK_NAME can be received during node failover,
causing the flag to be set and making the reconnect thread
always unsuccessful, thereafter.

Once the only place where it is set is removed, the remaining
bits are rendered moot.

Removing it does not prevent "mount" from failing when a non
existent share is passed.

What happens when the share really ceases to exist while the
share is mounted is undefined now as much as it was before.

Signed-off-by: Germano Percossi <germano.percossi@...rix.com>
Reviewed-by: Pavel Shilovsky <pshilov@...rosoft.com>
Signed-off-by: Steve French <smfrench@...il.com>
Signed-off-by: Jiri Slaby <jslaby@...e.cz>
---
 fs/cifs/cifsglob.h | 1 -
 fs/cifs/smb2pdu.c  | 5 -----
 2 files changed, 6 deletions(-)

diff --git a/fs/cifs/cifsglob.h b/fs/cifs/cifsglob.h
index 4b87feaa507f..1472ee04cadd 100644
--- a/fs/cifs/cifsglob.h
+++ b/fs/cifs/cifsglob.h
@@ -837,7 +837,6 @@ struct cifs_tcon {
 	bool need_reconnect:1; /* connection reset, tid now invalid */
 #ifdef CONFIG_CIFS_SMB2
 	bool print:1;		/* set if connection to printer share */
-	bool bad_network_name:1; /* set if ret status STATUS_BAD_NETWORK_NAME */
 	__le32 capabilities;
 	__u32 share_flags;
 	__u32 maximal_access;
diff --git a/fs/cifs/smb2pdu.c b/fs/cifs/smb2pdu.c
index c7a400415d02..79db9c46ada9 100644
--- a/fs/cifs/smb2pdu.c
+++ b/fs/cifs/smb2pdu.c
@@ -839,9 +839,6 @@ SMB2_tcon(const unsigned int xid, struct cifs_ses *ses, const char *tree,
 	else
 		return -EIO;
 
-	if (tcon && tcon->bad_network_name)
-		return -ENOENT;
-
 	unc_path = kmalloc(MAX_SHARENAME_LENGTH * 2, GFP_KERNEL);
 	if (unc_path == NULL)
 		return -ENOMEM;
@@ -935,8 +932,6 @@ tcon_exit:
 tcon_error_exit:
 	if (rsp->hdr.Status == STATUS_BAD_NETWORK_NAME) {
 		cifs_dbg(VFS, "BAD_NETWORK_NAME: %s\n", tree);
-		if (tcon)
-			tcon->bad_network_name = true;
 	}
 	goto tcon_exit;
 }
-- 
2.12.2