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authorYan, Zheng <zyan@redhat.com>2015-03-24 20:15:36 +0800
committerIlya Dryomov <idryomov@gmail.com>2015-04-20 18:55:37 +0300
commit1c841a96b5f369cbb0b169d13825c7ff7d0fba8d (patch)
tree23949a63a1b45871a2d47cf428c9bb159d7b5740 /fs/ceph
parenta9f6eb61850e1599f9aa5141f25ccc1d8248e174 (diff)
downloadlinux-1c841a96b5f369cbb0b169d13825c7ff7d0fba8d.tar.bz2
ceph: cleanup unsafe requests when reconnecting is denied
Signed-off-by: Yan, Zheng <zyan@redhat.com>
Diffstat (limited to 'fs/ceph')
-rw-r--r--fs/ceph/mds_client.c28
1 files changed, 28 insertions, 0 deletions
diff --git a/fs/ceph/mds_client.c b/fs/ceph/mds_client.c
index c3bac611a097..fd5585b8d382 100644
--- a/fs/ceph/mds_client.c
+++ b/fs/ceph/mds_client.c
@@ -1021,6 +1021,33 @@ static void cleanup_cap_releases(struct ceph_mds_session *session)
spin_unlock(&session->s_cap_lock);
}
+static void cleanup_session_requests(struct ceph_mds_client *mdsc,
+ struct ceph_mds_session *session)
+{
+ struct ceph_mds_request *req;
+ struct rb_node *p;
+
+ dout("cleanup_session_requests mds%d\n", session->s_mds);
+ mutex_lock(&mdsc->mutex);
+ while (!list_empty(&session->s_unsafe)) {
+ req = list_first_entry(&session->s_unsafe,
+ struct ceph_mds_request, r_unsafe_item);
+ list_del_init(&req->r_unsafe_item);
+ pr_info(" dropping unsafe request %llu\n", req->r_tid);
+ __unregister_request(mdsc, req);
+ }
+ /* zero r_attempts, so kick_requests() will re-send requests */
+ p = rb_first(&mdsc->request_tree);
+ while (p) {
+ req = rb_entry(p, struct ceph_mds_request, r_node);
+ p = rb_next(p);
+ if (req->r_session &&
+ req->r_session->s_mds == session->s_mds)
+ req->r_attempts = 0;
+ }
+ mutex_unlock(&mdsc->mutex);
+}
+
/*
* Helper to safely iterate over all caps associated with a session, with
* special care taken to handle a racing __ceph_remove_cap().
@@ -2589,6 +2616,7 @@ static void handle_session(struct ceph_mds_session *session,
case CEPH_SESSION_CLOSE:
if (session->s_state == CEPH_MDS_SESSION_RECONNECTING)
pr_info("mds%d reconnect denied\n", session->s_mds);
+ cleanup_session_requests(mdsc, session);
remove_session_caps(session);
wake = 2; /* for good measure */
wake_up_all(&mdsc->session_close_wq);