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ceph: cleanup unsafe requests when reconnecting is denied

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Signed-off-by: Yan, Zheng <zyan@redhat.com>
This commit is contained in:
Yan, Zheng 2015-03-24 20:15:36 +08:00 committed by Ilya Dryomov
parent a9f6eb6185
commit 1c841a96b5
1 changed files with 28 additions and 0 deletions
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28
fs/ceph/mds_client.c
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@ -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);