Return-Path: linux-nfs-owner@vger.kernel.org Received: from mail-lb0-f170.google.com ([209.85.217.170]:59624 "EHLO mail-lb0-f170.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753884Ab3DZMAH (ORCPT ); Fri, 26 Apr 2013 08:00:07 -0400 From: Pavel Shilovsky To: linux-kernel@vger.kernel.org Cc: linux-cifs@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-nfs@vger.kernel.org, wine-devel@winehq.org Subject: [PATCH v6 7/7] locks: Disable LOCK_MAND support for MS_SHARELOCK mounts Date: Fri, 26 Apr 2013 16:04:21 +0400 Message-Id: <1366977861-27678-8-git-send-email-piastry@etersoft.ru> In-Reply-To: <1366977861-27678-1-git-send-email-piastry@etersoft.ru> References: <1366977861-27678-1-git-send-email-piastry@etersoft.ru> Sender: linux-nfs-owner@vger.kernel.org List-ID: Signed-off-by: Pavel Shilovsky --- fs/locks.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/fs/locks.c b/fs/locks.c index 25c3a49..7d67e0e 100644 --- a/fs/locks.c +++ b/fs/locks.c @@ -1756,6 +1756,12 @@ SYSCALL_DEFINE2(flock, unsigned int, fd, unsigned int, cmd) goto out; } + /* Disable LOCK_MAND support for FS mounted with MS_SHARELOCK */ + if ((cmd & LOCK_MAND) && IS_SHARELOCK(f.file->f_path.dentry->d_inode)) { + error = -EPERM; + goto out; + } + can_sleep = !(cmd & LOCK_NB); cmd &= ~LOCK_NB; unlock = (cmd == LOCK_UN); -- 1.8.1.5