libceph: embed ceph connection structure in mon_client

(cherry picked from commit 67130934fb579fdf0f2f6d745960264378b57dc8)

A monitor client has a pointer to a ceph connection structure in it.
This is the only one of the three ceph client types that do it this
way; the OSD and MDS clients embed the connection into their main
structures.  There is always exactly one ceph connection for a
monitor client, so there is no need to allocate it separate from the
monitor client structure.

So switch the ceph_mon_client structure to embed its
ceph_connection structure.

Signed-off-by: Alex Elder <elder@inktank.com>
Reviewed-by: Sage Weil <sage@inktank.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/include/linux/ceph/mon_client.h b/include/linux/ceph/mon_client.h
index 545f85917780ab3cd65a314553f7011b655dbb50..2113e3850a4e0c7e088b22b07092baf2616654a5 100644 (file)
--- a/include/linux/ceph/mon_client.h
+++ b/include/linux/ceph/mon_client.h
@@ -70,7 +70,7 @@ struct ceph_mon_client {
        bool hunting;
        int cur_mon;                       /* last monitor i contacted */
        unsigned long sub_sent, sub_renew_after;
-       struct ceph_connection *con;
+       struct ceph_connection con;
        bool have_fsid;
 
        /* pending generic requests */

diff --git a/net/ceph/mon_client.c b/net/ceph/mon_client.c
index b2d9ce4d80d9bafb73d9e5fff03072b41f87c980..5cdd8f6d38dafd7a2e143c2965d5dc0efa5e3853 100644 (file)
--- a/net/ceph/mon_client.c
+++ b/net/ceph/mon_client.c
@@ -106,9 +106,9 @@ static void __send_prepared_auth_request(struct ceph_mon_client *monc, int len)
        monc->pending_auth = 1;
        monc->m_auth->front.iov_len = len;
        monc->m_auth->hdr.front_len = cpu_to_le32(len);
-       ceph_con_revoke(monc->con, monc->m_auth);
+       ceph_con_revoke(&monc->con, monc->m_auth);
        ceph_msg_get(monc->m_auth);  /* keep our ref */
-       ceph_con_send(monc->con, monc->m_auth);
+       ceph_con_send(&monc->con, monc->m_auth);
 }
 
 /*
@@ -117,8 +117,8 @@ static void __send_prepared_auth_request(struct ceph_mon_client *monc, int len)
 static void __close_session(struct ceph_mon_client *monc)
 {
        dout("__close_session closing mon%d\n", monc->cur_mon);
-       ceph_con_revoke(monc->con, monc->m_auth);
-       ceph_con_close(monc->con);
+       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);
@@ -142,9 +142,9 @@ static int __open_session(struct ceph_mon_client *monc)
                monc->want_next_osdmap = !!monc->want_next_osdmap;
 
                dout("open_session mon%d opening\n", monc->cur_mon);
-               monc->con->peer_name.type = CEPH_ENTITY_TYPE_MON;
-               monc->con->peer_name.num = cpu_to_le64(monc->cur_mon);
-               ceph_con_open(monc->con,
+               monc->con.peer_name.type = CEPH_ENTITY_TYPE_MON;
+               monc->con.peer_name.num = cpu_to_le64(monc->cur_mon);
+               ceph_con_open(&monc->con,
                              &monc->monmap->mon_inst[monc->cur_mon].addr);
 
                /* initiatiate authentication handshake */
@@ -226,8 +226,8 @@ static void __send_subscribe(struct ceph_mon_client *monc)
 
                msg->front.iov_len = p - msg->front.iov_base;
                msg->hdr.front_len = cpu_to_le32(msg->front.iov_len);
-               ceph_con_revoke(monc->con, msg);
-               ceph_con_send(monc->con, ceph_msg_get(msg));
+               ceph_con_revoke(&monc->con, msg);
+               ceph_con_send(&monc->con, ceph_msg_get(msg));
 
                monc->sub_sent = jiffies | 1;  /* never 0 */
        }
@@ -247,7 +247,7 @@ static void handle_subscribe_ack(struct ceph_mon_client *monc,
        if (monc->hunting) {
                pr_info("mon%d %s session established\n",
                        monc->cur_mon,
-                       ceph_pr_addr(&monc->con->peer_addr.in_addr));
+                       ceph_pr_addr(&monc->con.peer_addr.in_addr));
                monc->hunting = false;
        }
        dout("handle_subscribe_ack after %d seconds\n", seconds);
@@ -461,7 +461,7 @@ static int do_generic_request(struct ceph_mon_client *monc,
        req->request->hdr.tid = cpu_to_le64(req->tid);
        __insert_generic_request(monc, req);
        monc->num_generic_requests++;
-       ceph_con_send(monc->con, ceph_msg_get(req->request));
+       ceph_con_send(&monc->con, ceph_msg_get(req->request));
        mutex_unlock(&monc->mutex);
 
        err = wait_for_completion_interruptible(&req->completion);
@@ -684,8 +684,8 @@ static void __resend_generic_request(struct ceph_mon_client *monc)
 
        for (p = rb_first(&monc->generic_request_tree); p; p = rb_next(p)) {
                req = rb_entry(p, struct ceph_mon_generic_request, node);
-               ceph_con_revoke(monc->con, req->request);
-               ceph_con_send(monc->con, ceph_msg_get(req->request));
+               ceph_con_revoke(&monc->con, req->request);
+               ceph_con_send(&monc->con, ceph_msg_get(req->request));
        }
 }
 
@@ -705,7 +705,7 @@ static void delayed_work(struct work_struct *work)
                __close_session(monc);
                __open_session(monc);  /* continue hunting */
        } else {
-               ceph_con_keepalive(monc->con);
+               ceph_con_keepalive(&monc->con);
 
                __validate_auth(monc);
 
@@ -760,19 +760,16 @@ int ceph_monc_init(struct ceph_mon_client *monc, struct ceph_client *cl)
                goto out;
 
        /* 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;
+       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,
                                    cl->options->key);
        if (IS_ERR(monc->auth)) {
                err = PTR_ERR(monc->auth);
-               goto out_con;
+               goto out_monmap;
        }
        monc->auth->want_keys =
                CEPH_ENTITY_TYPE_AUTH | CEPH_ENTITY_TYPE_MON |
@@ -824,8 +821,6 @@ out_subscribe_ack:
        ceph_msg_put(monc->m_subscribe_ack);
 out_auth:
        ceph_auth_destroy(monc->auth);
-out_con:
-       monc->con->ops->put(monc->con);
 out_monmap:
        kfree(monc->monmap);
 out:
@@ -841,9 +836,7 @@ void ceph_monc_stop(struct ceph_mon_client *monc)
        mutex_lock(&monc->mutex);
        __close_session(monc);
 
-       monc->con->private = NULL;
-       monc->con->ops->put(monc->con);
-       monc->con = NULL;
+       monc->con.private = NULL;
 
        mutex_unlock(&monc->mutex);
 
@@ -1029,7 +1022,7 @@ static void mon_fault(struct ceph_connection *con)
        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));
+                       ceph_pr_addr(&monc->con.peer_addr.in_addr));
 
        __close_session(monc);
        if (!monc->hunting) {