libceph: embed ceph messenger structure in ceph_client
Alex Elder [Sun, 27 May 2012 04:26:43 +0000 (23:26 -0500)]
(cherry picked from commit 15d9882c336db2db73ccf9871ae2398e452f694c)

A ceph client has a pointer to a ceph messenger structure in it.
There is always exactly one ceph messenger for a ceph client, so
there is no need to allocate it separate from the ceph client
structure.

Switch the ceph_client structure to embed its ceph_messenger
structure.

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

fs/ceph/mds_client.c
include/linux/ceph/libceph.h
include/linux/ceph/messenger.h
net/ceph/ceph_common.c
net/ceph/messenger.c
net/ceph/mon_client.c
net/ceph/osd_client.c

index 200bc87..ad30261 100644 (file)
@@ -394,7 +394,7 @@ static struct ceph_mds_session *register_session(struct ceph_mds_client *mdsc,
        s->s_seq = 0;
        mutex_init(&s->s_mutex);
 
-       ceph_con_init(mdsc->fsc->client->msgr, &s->s_con);
+       ceph_con_init(&mdsc->fsc->client->msgr, &s->s_con);
        s->s_con.private = s;
        s->s_con.ops = &mds_con_ops;
        s->s_con.peer_name.type = CEPH_ENTITY_TYPE_MDS;
index e71d683..98ec36a 100644 (file)
@@ -132,7 +132,7 @@ struct ceph_client {
        u32 supported_features;
        u32 required_features;
 
-       struct ceph_messenger *msgr;   /* messenger instance */
+       struct ceph_messenger msgr;   /* messenger instance */
        struct ceph_mon_client monc;
        struct ceph_osd_client osdc;
 
index ce7a483..771b2ed 100644 (file)
@@ -203,10 +203,11 @@ extern int ceph_msgr_init(void);
 extern void ceph_msgr_exit(void);
 extern void ceph_msgr_flush(void);
 
-extern struct ceph_messenger *ceph_messenger_create(
-       struct ceph_entity_addr *myaddr,
-       u32 features, u32 required);
-extern void ceph_messenger_destroy(struct ceph_messenger *);
+extern void ceph_messenger_init(struct ceph_messenger *msgr,
+                       struct ceph_entity_addr *myaddr,
+                       u32 supported_features,
+                       u32 required_features,
+                       bool nocrc);
 
 extern void ceph_con_init(struct ceph_messenger *msgr,
                          struct ceph_connection *con);
index 5dedac5..c815f31 100644 (file)
@@ -468,19 +468,15 @@ struct ceph_client *ceph_create_client(struct ceph_options *opt, void *private,
        /* msgr */
        if (ceph_test_opt(client, MYIP))
                myaddr = &client->options->my_addr;
-       client->msgr = ceph_messenger_create(myaddr,
-                                            client->supported_features,
-                                            client->required_features);
-       if (IS_ERR(client->msgr)) {
-               err = PTR_ERR(client->msgr);
-               goto fail;
-       }
-       client->msgr->nocrc = ceph_test_opt(client, NOCRC);
+       ceph_messenger_init(&client->msgr, myaddr,
+               client->supported_features,
+               client->required_features,
+               ceph_test_opt(client, NOCRC));
 
        /* subsystems */
        err = ceph_monc_init(&client->monc, client);
        if (err < 0)
-               goto fail_msgr;
+               goto fail;
        err = ceph_osdc_init(&client->osdc, client);
        if (err < 0)
                goto fail_monc;
@@ -489,8 +485,6 @@ struct ceph_client *ceph_create_client(struct ceph_options *opt, void *private,
 
 fail_monc:
        ceph_monc_stop(&client->monc);
-fail_msgr:
-       ceph_messenger_destroy(client->msgr);
 fail:
        kfree(client);
        return ERR_PTR(err);
@@ -508,8 +502,6 @@ void ceph_destroy_client(struct ceph_client *client)
 
        ceph_debugfs_client_cleanup(client);
 
-       ceph_messenger_destroy(client->msgr);
-
        ceph_destroy_options(client->options);
 
        kfree(client);
index 2a8f3d3..9570c76 100644 (file)
@@ -2249,18 +2249,14 @@ out:
 
 
 /*
- * create a new messenger instance
+ * initialize a new messenger instance
  */
-struct ceph_messenger *ceph_messenger_create(struct ceph_entity_addr *myaddr,
-                                            u32 supported_features,
-                                            u32 required_features)
+void ceph_messenger_init(struct ceph_messenger *msgr,
+                       struct ceph_entity_addr *myaddr,
+                       u32 supported_features,
+                       u32 required_features,
+                       bool nocrc)
 {
-       struct ceph_messenger *msgr;
-
-       msgr = kzalloc(sizeof(*msgr), GFP_KERNEL);
-       if (msgr == NULL)
-               return ERR_PTR(-ENOMEM);
-
        msgr->supported_features = supported_features;
        msgr->required_features = required_features;
 
@@ -2273,19 +2269,11 @@ struct ceph_messenger *ceph_messenger_create(struct ceph_entity_addr *myaddr,
        msgr->inst.addr.type = 0;
        get_random_bytes(&msgr->inst.addr.nonce, sizeof(msgr->inst.addr.nonce));
        encode_my_addr(msgr);
+       msgr->nocrc = nocrc;
 
-       dout("messenger_create %p\n", msgr);
-       return msgr;
-}
-EXPORT_SYMBOL(ceph_messenger_create);
-
-void ceph_messenger_destroy(struct ceph_messenger *msgr)
-{
-       dout("destroy %p\n", msgr);
-       kfree(msgr);
-       dout("destroyed messenger %p\n", msgr);
+       dout("%s %p\n", __func__, msgr);
 }
-EXPORT_SYMBOL(ceph_messenger_destroy);
+EXPORT_SYMBOL(ceph_messenger_init);
 
 static void clear_standby(struct ceph_connection *con)
 {
index 852dbb4..b2d9ce4 100644 (file)
@@ -763,7 +763,7 @@ int ceph_monc_init(struct ceph_mon_client *monc, struct ceph_client *cl)
        monc->con = kmalloc(sizeof(*monc->con), GFP_KERNEL);
        if (!monc->con)
                goto out_monmap;
-       ceph_con_init(monc->client->msgr, monc->con);
+       ceph_con_init(&monc->client->msgr, monc->con);
        monc->con->private = monc;
        monc->con->ops = &mon_con_ops;
 
@@ -888,8 +888,8 @@ static void handle_auth_reply(struct ceph_mon_client *monc,
        } else if (!was_auth && monc->auth->ops->is_authenticated(monc->auth)) {
                dout("authenticated, starting session\n");
 
-               monc->client->msgr->inst.name.type = CEPH_ENTITY_TYPE_CLIENT;
-               monc->client->msgr->inst.name.num =
+               monc->client->msgr.inst.name.type = CEPH_ENTITY_TYPE_CLIENT;
+               monc->client->msgr.inst.name.num =
                                        cpu_to_le64(monc->auth->global_id);
 
                __send_subscribe(monc);
index f4e2a46..6c948dc 100644 (file)
@@ -639,7 +639,7 @@ static struct ceph_osd *create_osd(struct ceph_osd_client *osdc)
        INIT_LIST_HEAD(&osd->o_osd_lru);
        osd->o_incarnation = 1;
 
-       ceph_con_init(osdc->client->msgr, &osd->o_con);
+       ceph_con_init(&osdc->client->msgr, &osd->o_con);
        osd->o_con.private = osd;
        osd->o_con.ops = &osd_con_ops;
        osd->o_con.peer_name.type = CEPH_ENTITY_TYPE_OSD;
@@ -1391,7 +1391,7 @@ void ceph_osdc_handle_map(struct ceph_osd_client *osdc, struct ceph_msg *msg)
                             epoch, maplen);
                        newmap = osdmap_apply_incremental(&p, next,
                                                          osdc->osdmap,
-                                                         osdc->client->msgr);
+                                                         &osdc->client->msgr);
                        if (IS_ERR(newmap)) {
                                err = PTR_ERR(newmap);
                                goto bad;