target: Add TFO->put_session() caller for HW fabric session shutdown

This patch adds an optional target_core_fabric_ops->put_session() caller
within the existing target_put_session() code path.

This is required by tcm_qla2xxx code in order to invoke it's own fabric
specific session shutdown handler using se_session->sess_kref.

Signed-off-by: Joern Engel <joern@logfs.org>
Cc: Roland Dreier <roland@purestorage.com>
Cc: Arun Easi <arun.easi@qlogic.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>

diff --git a/drivers/target/target_core_transport.c b/drivers/target/target_core_transport.c
index b05fdc0c05d33df0560d03222f332fa40b249864..634d0f31a28cc59f621ea6122a13777c320339d5 100644 (file)
--- a/drivers/target/target_core_transport.c
+++ b/drivers/target/target_core_transport.c
@@ -315,7 +315,7 @@ void transport_register_session(
 }
 EXPORT_SYMBOL(transport_register_session);
 
-static void target_release_session(struct kref *kref)
+void target_release_session(struct kref *kref)
 {
        struct se_session *se_sess = container_of(kref,
                        struct se_session, sess_kref);
@@ -332,6 +332,12 @@ EXPORT_SYMBOL(target_get_session);
 
 void target_put_session(struct se_session *se_sess)
 {
+       struct se_portal_group *tpg = se_sess->se_tpg;
+
+       if (tpg->se_tpg_tfo->put_session != NULL) {
+               tpg->se_tpg_tfo->put_session(se_sess);
+               return;
+       }
        kref_put(&se_sess->sess_kref, target_release_session);
 }
 EXPORT_SYMBOL(target_put_session);

diff --git a/include/target/target_core_fabric.h b/include/target/target_core_fabric.h
index 116959933f46442b27075ba7d40c79c746308049..c78a23333c4fb801c72e86a55b05fd7e7bf66f67 100644 (file)
--- a/include/target/target_core_fabric.h
+++ b/include/target/target_core_fabric.h
@@ -47,6 +47,7 @@ struct target_core_fabric_ops {
         */
        int (*check_stop_free)(struct se_cmd *);
        void (*release_cmd)(struct se_cmd *);
+       void (*put_session)(struct se_session *);
        /*
         * Called with spin_lock_bh(struct se_portal_group->session_lock held.
         */