From patchwork Tue Jun 15 14:57:25 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jeff Layton X-Patchwork-Id: 460592 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=-19.2 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED, DKIM_VALID, DKIM_VALID_AU, INCLUDES_CR_TRAILER, INCLUDES_PATCH, MAILING_LIST_MULTI, SPF_HELO_NONE, 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 83458C48BDF for ; Tue, 15 Jun 2021 14:57:34 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 56B866145D for ; Tue, 15 Jun 2021 14:57:34 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231140AbhFOO7i (ORCPT ); Tue, 15 Jun 2021 10:59:38 -0400 Received: from mail.kernel.org ([198.145.29.99]:58704 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230298AbhFOO7g (ORCPT ); Tue, 15 Jun 2021 10:59:36 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id 04CB761584; Tue, 15 Jun 2021 14:57:31 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1623769052; bh=WeGkGoFuxB/K90Y0r5W0csZbjj8cH51PuDrA08JVSY0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=pYPTSUNnwcHBvRH2Q4EiPM73uqvqLRhh6+jSlgxHvXT2rUzeiwuZ+xNn0Q8dyCPUG 0dFqPd9E2CJdrxU2erqVDopZ/gjaiXPkmSi+4hwP8oGmurp895VPHfrSryzHJqO36V KrLmyzRmt/4MVQBryXJ9FYM2UT6Xrd3QqkxvcF3CuVtGwdhdlDXFnlNcY6+6V7Fxt9 pgg8aVQsHKA757Llwd3XcXpSb6NxauTOcC8nsRyuxoLopiTiONEa2rKPaHlPru6K/s SjR2bD0ZuFFDhaIkJnm9JNXob0uegpnLUlOsFcIxvwFSQHCsh1iqmlpHHNNuG5VZrb tiDH+WRbySXAw== From: Jeff Layton To: ceph-devel@vger.kernel.org Cc: pdonnell@redhat.com, ukernel@gmail.com, idryomov@gmail.com, xiubli@redhat.com Subject: [RFC PATCH 1/6] ceph: allow ceph_put_mds_session to take NULL or ERR_PTR Date: Tue, 15 Jun 2021 10:57:25 -0400 Message-Id: <20210615145730.21952-2-jlayton@kernel.org> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20210615145730.21952-1-jlayton@kernel.org> References: <20210615145730.21952-1-jlayton@kernel.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: ceph-devel@vger.kernel.org ...to simplify some error paths. Signed-off-by: Jeff Layton Reviewed-by: Luis Henriques --- fs/ceph/dir.c | 3 +-- fs/ceph/inode.c | 6 ++---- fs/ceph/mds_client.c | 6 ++++-- fs/ceph/metric.c | 3 +-- 4 files changed, 8 insertions(+), 10 deletions(-) diff --git a/fs/ceph/dir.c b/fs/ceph/dir.c index ac431246e0c9..0dc5f8357f58 100644 --- a/fs/ceph/dir.c +++ b/fs/ceph/dir.c @@ -1802,8 +1802,7 @@ static void ceph_d_release(struct dentry *dentry) dentry->d_fsdata = NULL; spin_unlock(&dentry->d_lock); - if (di->lease_session) - ceph_put_mds_session(di->lease_session); + ceph_put_mds_session(di->lease_session); kmem_cache_free(ceph_dentry_cachep, di); } diff --git a/fs/ceph/inode.c b/fs/ceph/inode.c index df0c8a724609..6f43542b3344 100644 --- a/fs/ceph/inode.c +++ b/fs/ceph/inode.c @@ -1154,8 +1154,7 @@ static inline void update_dentry_lease(struct inode *dir, struct dentry *dentry, __update_dentry_lease(dir, dentry, lease, session, from_time, &old_lease_session); spin_unlock(&dentry->d_lock); - if (old_lease_session) - ceph_put_mds_session(old_lease_session); + ceph_put_mds_session(old_lease_session); } /* @@ -1200,8 +1199,7 @@ static void update_dentry_lease_careful(struct dentry *dentry, from_time, &old_lease_session); out_unlock: spin_unlock(&dentry->d_lock); - if (old_lease_session) - ceph_put_mds_session(old_lease_session); + ceph_put_mds_session(old_lease_session); } /* diff --git a/fs/ceph/mds_client.c b/fs/ceph/mds_client.c index e5af591d3bd4..ec669634c649 100644 --- a/fs/ceph/mds_client.c +++ b/fs/ceph/mds_client.c @@ -664,6 +664,9 @@ struct ceph_mds_session *ceph_get_mds_session(struct ceph_mds_session *s) void ceph_put_mds_session(struct ceph_mds_session *s) { + if (IS_ERR_OR_NULL(s)) + return; + dout("mdsc put_session %p %d -> %d\n", s, refcount_read(&s->s_ref), refcount_read(&s->s_ref)-1); if (refcount_dec_and_test(&s->s_ref)) { @@ -1438,8 +1441,7 @@ static void __open_export_target_sessions(struct ceph_mds_client *mdsc, for (i = 0; i < mi->num_export_targets; i++) { ts = __open_export_target_session(mdsc, mi->export_targets[i]); - if (!IS_ERR(ts)) - ceph_put_mds_session(ts); + ceph_put_mds_session(ts); } } diff --git a/fs/ceph/metric.c b/fs/ceph/metric.c index 9577c71e645d..5ac151eb0d49 100644 --- a/fs/ceph/metric.c +++ b/fs/ceph/metric.c @@ -311,8 +311,7 @@ void ceph_metric_destroy(struct ceph_client_metric *m) cancel_delayed_work_sync(&m->delayed_work); - if (m->session) - ceph_put_mds_session(m->session); + ceph_put_mds_session(m->session); } #define METRIC_UPDATE_MIN_MAX(min, max, new) \