From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-9.0 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_PASS,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id A878DC43219 for ; Mon, 29 Apr 2019 04:54:10 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 80D792087B for ; Mon, 29 Apr 2019 04:54:10 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727141AbfD2EyI (ORCPT ); Mon, 29 Apr 2019 00:54:08 -0400 Received: from mga03.intel.com ([134.134.136.65]:28440 "EHLO mga03.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725468AbfD2EyF (ORCPT ); Mon, 29 Apr 2019 00:54:05 -0400 X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from orsmga003.jf.intel.com ([10.7.209.27]) by orsmga103.jf.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 28 Apr 2019 21:54:04 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.60,408,1549958400"; d="scan'208";a="146566271" Received: from iweiny-desk2.sc.intel.com ([10.3.52.157]) by orsmga003.jf.intel.com with ESMTP; 28 Apr 2019 21:54:04 -0700 From: ira.weiny@intel.com To: lsf-pc@lists.linux-foundation.org Cc: linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, Dan Williams , Jan Kara , =?UTF-8?q?J=C3=A9r=C3=B4me=20Glisse?= , John Hubbard , Michal Hocko , Ira Weiny Subject: [RFC PATCH 01/10] fs/locks: Add trace_leases_conflict Date: Sun, 28 Apr 2019 21:53:50 -0700 Message-Id: <20190429045359.8923-2-ira.weiny@intel.com> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20190429045359.8923-1-ira.weiny@intel.com> References: <20190429045359.8923-1-ira.weiny@intel.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Ira Weiny Signed-off-by: Ira Weiny --- fs/locks.c | 20 ++++++++++++++----- include/trace/events/filelock.h | 35 +++++++++++++++++++++++++++++++++ 2 files changed, 50 insertions(+), 5 deletions(-) diff --git a/fs/locks.c b/fs/locks.c index eaa1cfaf73b0..4b66ed91fb53 100644 --- a/fs/locks.c +++ b/fs/locks.c @@ -1528,11 +1528,21 @@ static void time_out_leases(struct inode *inode, struct list_head *dispose) static bool leases_conflict(struct file_lock *lease, struct file_lock *breaker) { - if ((breaker->fl_flags & FL_LAYOUT) != (lease->fl_flags & FL_LAYOUT)) - return false; - if ((breaker->fl_flags & FL_DELEG) && (lease->fl_flags & FL_LEASE)) - return false; - return locks_conflict(breaker, lease); + bool rc; + + if ((breaker->fl_flags & FL_LAYOUT) != (lease->fl_flags & FL_LAYOUT)) { + rc = false; + goto trace; + } + if ((breaker->fl_flags & FL_DELEG) && (lease->fl_flags & FL_LEASE)) { + rc = false; + goto trace; + } + + rc = locks_conflict(breaker, lease); +trace: + trace_leases_conflict(rc, lease, breaker); + return rc; } static bool diff --git a/include/trace/events/filelock.h b/include/trace/events/filelock.h index fad7befa612d..4b735923f2ff 100644 --- a/include/trace/events/filelock.h +++ b/include/trace/events/filelock.h @@ -203,6 +203,41 @@ TRACE_EVENT(generic_add_lease, show_fl_type(__entry->fl_type)) ); +TRACE_EVENT(leases_conflict, + TP_PROTO(bool conflict, struct file_lock *lease, struct file_lock *breaker), + + TP_ARGS(conflict, lease, breaker), + + TP_STRUCT__entry( + __field(void *, lease) + __field(void *, breaker) + __field(unsigned int, l_fl_flags) + __field(unsigned int, b_fl_flags) + __field(unsigned char, l_fl_type) + __field(unsigned char, b_fl_type) + __field(bool, conflict) + ), + + TP_fast_assign( + __entry->lease = lease; + __entry->l_fl_flags = lease->fl_flags; + __entry->l_fl_type = lease->fl_type; + __entry->breaker = breaker; + __entry->b_fl_flags = breaker->fl_flags; + __entry->b_fl_type = breaker->fl_type; + __entry->conflict = conflict; + ), + + TP_printk("conflict %d: lease=0x%p fl_flags=%s fl_type=%s; breaker=0x%p fl_flags=%s fl_type=%s", + __entry->conflict, + __entry->lease, + show_fl_flags(__entry->l_fl_flags), + show_fl_type(__entry->l_fl_type), + __entry->breaker, + show_fl_flags(__entry->b_fl_flags), + show_fl_type(__entry->b_fl_type)) +); + #endif /* _TRACE_FILELOCK_H */ /* This part must be outside protection */ -- 2.20.1