libceph: always preallocate mon connection

Allocate the mon connection on init.  We already reuse it across
reconnects.  Remove now unnecessary (and incomplete) NULL checks.

Signed-off-by: Sage Weil <sage@newdream.net>

diff --git a/net/ceph/mon_client.c b/net/ceph/mon_client.c
index cbe31fa..5567216 100644 (file)
--- a/net/ceph/mon_client.c
+++ b/net/ceph/mon_client.c
@@ -116,14 +116,12 @@ static void __send_prepared_auth_request(struct ceph_mon_client *monc, int len)
  */
 static void __close_session(struct ceph_mon_client *monc)
 {
-       if (monc->con) {
-               dout("__close_session closing mon%d\n", monc->cur_mon);
-               ceph_con_revoke(monc->con, monc->m_auth);
-               ceph_con_close(monc->con);
-               monc->cur_mon = -1;
-               monc->pending_auth = 0;
-               ceph_auth_reset(monc->auth);
-       }
+       dout("__close_session closing mon%d\n", monc->cur_mon);
+       ceph_con_revoke(monc->con, monc->m_auth);
+       ceph_con_close(monc->con);
+       monc->cur_mon = -1;
+       monc->pending_auth = 0;
+       ceph_auth_reset(monc->auth);
 }
 
 /*
@@ -302,15 +300,6 @@ void ceph_monc_request_next_osdmap(struct ceph_mon_client *monc)
  */
 int ceph_monc_open_session(struct ceph_mon_client *monc)
 {
-       if (!monc->con) {
-               monc->con = kmalloc(sizeof(*monc->con), GFP_KERNEL);
-               if (!monc->con)
-                       return -ENOMEM;
-               ceph_con_init(monc->client->msgr, monc->con);
-               monc->con->private = monc;
-               monc->con->ops = &mon_con_ops;
-       }
-
        mutex_lock(&monc->mutex);
        __open_session(monc);
        __schedule_delayed(monc);
@@ -755,7 +744,13 @@ int ceph_monc_init(struct ceph_mon_client *monc, struct ceph_client *cl)
        if (err)
                goto out;
 
-       monc->con = NULL;
+       /* connection */
+       monc->con = kmalloc(sizeof(*monc->con), GFP_KERNEL);
+       if (!monc->con)
+               goto out_monmap;
+       ceph_con_init(monc->client->msgr, monc->con);
+       monc->con->private = monc;
+       monc->con->ops = &mon_con_ops;
 
        /* authentication */
        monc->auth = ceph_auth_init(cl->options->name,
@@ -772,7 +767,7 @@ int ceph_monc_init(struct ceph_mon_client *monc, struct ceph_client *cl)
                                     sizeof(struct ceph_mon_subscribe_ack),
                                     GFP_NOFS);
        if (!monc->m_subscribe_ack)
-               goto out_monmap;
+               goto out_con;
 
        monc->m_subscribe = ceph_msg_new(CEPH_MSG_MON_SUBSCRIBE, 96, GFP_NOFS);
        if (!monc->m_subscribe)
@@ -808,6 +803,8 @@ out_subscribe:
        ceph_msg_put(monc->m_subscribe);
 out_subscribe_ack:
        ceph_msg_put(monc->m_subscribe_ack);
+out_con:
+       monc->con->ops->put(monc->con);
 out_monmap:
        kfree(monc->monmap);
 out:
@@ -822,11 +819,11 @@ void ceph_monc_stop(struct ceph_mon_client *monc)
 
        mutex_lock(&monc->mutex);
        __close_session(monc);
-       if (monc->con) {
-               monc->con->private = NULL;
-               monc->con->ops->put(monc->con);
-               monc->con = NULL;
-       }
+
+       monc->con->private = NULL;
+       monc->con->ops->put(monc->con);
+       monc->con = NULL;
+
        mutex_unlock(&monc->mutex);
 
        ceph_auth_destroy(monc->auth);
@@ -1000,7 +997,7 @@ static void mon_fault(struct ceph_connection *con)
        if (!con->private)
                goto out;
 
-       if (monc->con && !monc->hunting)
+       if (!monc->hunting)
                pr_info("mon%d %s session lost, "
                        "hunting for new mon\n", monc->cur_mon,
                        ceph_pr_addr(&monc->con->peer_addr.in_addr));