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[2003:dc:6f45:eb00:230:64ff:fe74:809]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-4606f2b0c10sm7541814f8f.21.2026.06.12.10.05.41 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 12 Jun 2026 10:05:42 -0700 (PDT) From: Max Kellermann To: idryomov@gmail.com, amarkuze@redhat.com, ceph-devel@vger.kernel.org, linux-kernel@vger.kernel.org Cc: Max Kellermann Subject: [PATCH 2/3] fs/ceph/caps: mark cap remove with RB_CLEAR_NODE() instead of ci=NULL Date: Fri, 12 Jun 2026 19:05:36 +0200 Message-ID: <20260612170537.92970-2-max.kellermann@ionos.com> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20260612170537.92970-1-max.kellermann@ionos.com> References: <20260612170537.92970-1-max.kellermann@ionos.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit __ceph_remove_cap() erases the ceph_cap object from the RB tree, thus it seems natural to use RB_CLEAR_NODE() / RB_EMPTY_NODE() for the removal check. Signed-off-by: Max Kellermann --- fs/ceph/caps.c | 11 +++++------ fs/ceph/mds_client.c | 2 +- 2 files changed, 6 insertions(+), 7 deletions(-) diff --git a/fs/ceph/caps.c b/fs/ceph/caps.c index efa6a15c470b..9e7c76a66624 100644 --- a/fs/ceph/caps.c +++ b/fs/ceph/caps.c @@ -1128,8 +1128,8 @@ static void __ceph_remove_cap(struct ceph_cap *cap, bool queue_release) struct ceph_mds_client *mdsc; int removed = 0; - /* 'ci' being NULL means the remove have already occurred */ - if (!ci) { + if (RB_EMPTY_NODE(&cap->ci_node)) { + /* this means the remove has already occurred */ doutc(cl, "inode is NULL\n"); return; } @@ -1142,6 +1142,7 @@ static void __ceph_remove_cap(struct ceph_cap *cap, bool queue_release) /* remove from inode's cap rbtree, and clear auth cap */ rb_erase(&cap->ci_node, &ci->i_caps); + RB_CLEAR_NODE(&cap->ci_node); if (ci->i_auth_cap == cap) ci->i_auth_cap = NULL; @@ -1158,8 +1159,6 @@ static void __ceph_remove_cap(struct ceph_cap *cap, bool queue_release) cap->session = NULL; removed = 1; } - /* protect backpointer with s_cap_lock: see iterate_session_caps */ - cap->ci = NULL; /* * s_cap_reconnect is protected by s_cap_lock. no one changes @@ -1201,8 +1200,8 @@ void ceph_remove_cap(struct ceph_mds_client *mdsc, struct ceph_cap *cap, struct ceph_inode_info *ci = cap->ci; struct ceph_fs_client *fsc; - /* 'ci' being NULL means the remove have already occurred */ - if (!ci) { + if (RB_EMPTY_NODE(&cap->ci_node)) { + /* this means the remove has already occurred */ doutc(mdsc->fsc->client, "inode is NULL\n"); return; } diff --git a/fs/ceph/mds_client.c b/fs/ceph/mds_client.c index ed17e0023705..f092960953a8 100644 --- a/fs/ceph/mds_client.c +++ b/fs/ceph/mds_client.c @@ -1900,7 +1900,7 @@ int ceph_iterate_session_caps(struct ceph_mds_session *session, spin_lock(&session->s_cap_lock); p = p->next; - if (!cap->ci) { + if (RB_EMPTY_NODE(&cap->ci_node)) { doutc(cl, "finishing cap %p removal\n", cap); BUG_ON(cap->session != session); cap->session = NULL; -- 2.47.3