linux-kernel - [PATCH 3.12 053/123] disabling oplocks/leases via module parm enable

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Message-Id: <1872e49ddb45f5c8f3144d77cee5949bebac2b9d.1446021555.git.jslaby@suse.cz>
Date:	Wed, 28 Oct 2015 14:52:44 +0100
From:	Jiri Slaby <jslaby@...e.cz>
To:	stable@...r.kernel.org
Cc:	linux-kernel@...r.kernel.org, Steve French <smfrench@...il.com>,
	Steve French <steve.french@...marydata.com>,
	Jiri Slaby <jslaby@...e.cz>
Subject: [PATCH 3.12 053/123] disabling oplocks/leases via module parm enable_oplocks broken for SMB3

From: Steve French <smfrench@...il.com>

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

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

commit e0ddde9d44e37fbc21ce893553094ecf1a633ab5 upstream.

leases (oplocks) were always requested for SMB2/SMB3 even when oplocks
disabled in the cifs.ko module.

Signed-off-by: Steve French <steve.french@...marydata.com>
Reviewed-by: Chandrika Srinivasan <chandrika.srinivasan@...rix.com>
Signed-off-by: Jiri Slaby <jslaby@...e.cz>
---
 fs/cifs/smb2ops.c | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/fs/cifs/smb2ops.c b/fs/cifs/smb2ops.c
index 6f79cd867a2e..57519567b2ac 100644
--- a/fs/cifs/smb2ops.c
+++ b/fs/cifs/smb2ops.c
@@ -49,9 +49,13 @@ change_conf(struct TCP_Server_Info *server)
 		break;
 	default:
 		server->echoes = true;
-		server->oplocks = true;
+		if (enable_oplocks) {
+			server->oplocks = true;
+			server->oplock_credits = 1;
+		} else
+			server->oplocks = false;
+
 		server->echo_credits = 1;
-		server->oplock_credits = 1;
 	}
 	server->credits -= server->echo_credits + server->oplock_credits;
 	return 0;
-- 
2.6.2

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