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=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_PASS,USER_AGENT_GIT autolearn=ham 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 2DFF3C10F11 for ; Wed, 24 Apr 2019 17:21:19 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id EF44020675 for ; Wed, 24 Apr 2019 17:21:18 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1556126479; bh=0bTFuc5R1h+IIRtWIQSiaVAdk/UHer8eQqNQaVzakAY=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=POyiQFoXpzpBnoZMSWv23KnMVamoPb86EeSyk63w+fyZOqXWKoDvXSIy5qvNNycV3 GC5yD5HpE0kSGtDQIkgY4B9vorbyRmEHdVustVJ6or5Dy0Modz5fL8oSl6ZZsiEQcH mmn36PlNFvt3GRfeNzkQ5Y+dNX4SvwGZUprhEZB8= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2389309AbfDXRVR (ORCPT ); Wed, 24 Apr 2019 13:21:17 -0400 Received: from mail.kernel.org ([198.145.29.99]:46714 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2389283AbfDXRVM (ORCPT ); Wed, 24 Apr 2019 13:21:12 -0400 Received: from localhost (62-193-50-229.as16211.net [62.193.50.229]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 4612B20675; Wed, 24 Apr 2019 17:21:11 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1556126471; bh=0bTFuc5R1h+IIRtWIQSiaVAdk/UHer8eQqNQaVzakAY=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=hOqcF9z1LmDVpX/+zSqcf0aVZXUh7coJ7376NfilzbBen7zVKG0N7GpHRcuXRiVtq GMgynjrCkp5Av20FAkqSIhhUzhgK3h17uz3p2xu4dbnS3/CSvdFdLCSN6bHzyKky21 jdEgQIfvstJSV8icvECNCo7zPAIbUtBmQt4DVVGU= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Dinu-Razvan Chis-Serban , Dominique Martinet , Sasha Levin Subject: [PATCH 4.4 121/168] 9p locks: add mount option for lock retry interval Date: Wed, 24 Apr 2019 19:09:25 +0200 Message-Id: <20190424170930.566380876@linuxfoundation.org> X-Mailer: git-send-email 2.21.0 In-Reply-To: <20190424170923.452349382@linuxfoundation.org> References: <20190424170923.452349382@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org [ Upstream commit 5e172f75e51e3de1b4274146d9b990f803cb5c2a ] The default P9_LOCK_TIMEOUT can be too long for some users exporting a local file system to a guest VM (30s), make this configurable at mount time. Link: http://lkml.kernel.org/r/1536295827-3181-1-git-send-email-asmadeus@codewreck.org Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=195727 Signed-off-by: Dinu-Razvan Chis-Serban Signed-off-by: Dominique Martinet Signed-off-by: Sasha Levin --- fs/9p/v9fs.c | 21 +++++++++++++++++++++ fs/9p/v9fs.h | 1 + fs/9p/vfs_file.c | 6 +++++- 3 files changed, 27 insertions(+), 1 deletion(-) diff --git a/fs/9p/v9fs.c b/fs/9p/v9fs.c index 6caca025019d..1e9bb8db7b48 100644 --- a/fs/9p/v9fs.c +++ b/fs/9p/v9fs.c @@ -59,6 +59,8 @@ enum { Opt_cache_loose, Opt_fscache, Opt_mmap, /* Access options */ Opt_access, Opt_posixacl, + /* Lock timeout option */ + Opt_locktimeout, /* Error token */ Opt_err }; @@ -78,6 +80,7 @@ static const match_table_t tokens = { {Opt_cachetag, "cachetag=%s"}, {Opt_access, "access=%s"}, {Opt_posixacl, "posixacl"}, + {Opt_locktimeout, "locktimeout=%u"}, {Opt_err, NULL} }; @@ -126,6 +129,7 @@ static int v9fs_parse_options(struct v9fs_session_info *v9ses, char *opts) #ifdef CONFIG_9P_FSCACHE v9ses->cachetag = NULL; #endif + v9ses->session_lock_timeout = P9_LOCK_TIMEOUT; if (!opts) return 0; @@ -298,6 +302,23 @@ static int v9fs_parse_options(struct v9fs_session_info *v9ses, char *opts) #endif break; + case Opt_locktimeout: + r = match_int(&args[0], &option); + if (r < 0) { + p9_debug(P9_DEBUG_ERROR, + "integer field, but no integer?\n"); + ret = r; + continue; + } + if (option < 1) { + p9_debug(P9_DEBUG_ERROR, + "locktimeout must be a greater than zero integer.\n"); + ret = -EINVAL; + continue; + } + v9ses->session_lock_timeout = (long)option * HZ; + break; + default: continue; } diff --git a/fs/9p/v9fs.h b/fs/9p/v9fs.h index 6877050384a1..3775f275ede3 100644 --- a/fs/9p/v9fs.h +++ b/fs/9p/v9fs.h @@ -116,6 +116,7 @@ struct v9fs_session_info { struct list_head slist; /* list of sessions registered with v9fs */ struct backing_dev_info bdi; struct rw_semaphore rename_sem; + long session_lock_timeout; /* retry interval for blocking locks */ }; /* cache_validity flags */ diff --git a/fs/9p/vfs_file.c b/fs/9p/vfs_file.c index 62ce8b4a7e5f..373cc50544e9 100644 --- a/fs/9p/vfs_file.c +++ b/fs/9p/vfs_file.c @@ -154,6 +154,7 @@ static int v9fs_file_do_lock(struct file *filp, int cmd, struct file_lock *fl) uint8_t status = P9_LOCK_ERROR; int res = 0; unsigned char fl_type; + struct v9fs_session_info *v9ses; fid = filp->private_data; BUG_ON(fid == NULL); @@ -189,6 +190,8 @@ static int v9fs_file_do_lock(struct file *filp, int cmd, struct file_lock *fl) if (IS_SETLKW(cmd)) flock.flags = P9_LOCK_FLAGS_BLOCK; + v9ses = v9fs_inode2v9ses(file_inode(filp)); + /* * if its a blocked request and we get P9_LOCK_BLOCKED as the status * for lock request, keep on trying @@ -202,7 +205,8 @@ static int v9fs_file_do_lock(struct file *filp, int cmd, struct file_lock *fl) break; if (status == P9_LOCK_BLOCKED && !IS_SETLKW(cmd)) break; - if (schedule_timeout_interruptible(P9_LOCK_TIMEOUT) != 0) + if (schedule_timeout_interruptible(v9ses->session_lock_timeout) + != 0) break; /* * p9_client_lock_dotl overwrites flock.client_id with the -- 2.19.1