linux-kernel - [PATCH 3.16.y-ckt 044/104] disabling oplocks/leases via module parm enable

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Message-Id: <1445867006-18048-45-git-send-email-luis.henriques@canonical.com>
Date:	Mon, 26 Oct 2015 13:42:26 +0000
From:	Luis Henriques <luis.henriques@...onical.com>
To:	linux-kernel@...r.kernel.org, stable@...r.kernel.org,
	kernel-team@...ts.ubuntu.com
Cc:	Steve French <steve.french@...marydata.com>,
	Luis Henriques <luis.henriques@...onical.com>
Subject: [PATCH 3.16.y-ckt 044/104] disabling oplocks/leases via module parm enable_oplocks broken for SMB3

3.16.7-ckt19 -stable review patch.  If anyone has any objections, please let me know.

------------------

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

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: Luis Henriques <luis.henriques@...onical.com>
---
 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 772ee0ecf32a..b241a2a7683b 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;
--
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