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authorNicholas Bellinger <nab@linux-iscsi.org>2012-02-27 10:22:10 +0400
committerNicholas Bellinger <nab@linux-iscsi.org>2012-03-11 02:41:53 +0400
commit41ac82b668177876d5965d5f60956fb0fbcdb514 (patch)
tree229c299330fa9c3cb4cb5a1903e0559e3e7a5d5b /drivers/target
parent140854cb72525246745b67300d35101ad2875a39 (diff)
downloadlinux-41ac82b668177876d5965d5f60956fb0fbcdb514.tar.xz
target: Add se_sess->sess_kref + get/put helpers
This patch adds basic se_session->sess_kref and get/put helpers for fabric session reference counting. It sets the initial kref in transport_init_session() and adds a target_release_session() callback to invoke TFO->close_session() for final session shutdown. Cc: Roland Dreier <roland@purestorage.com> Cc: Christoph Hellwig <hch@lst.de> Cc: Joern Engel <joern@logfs.org> Cc: Andy Grover <agrover@redhat.com> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
Diffstat (limited to 'drivers/target')
-rw-r--r--drivers/target/target_core_transport.c22
1 files changed, 22 insertions, 0 deletions
diff --git a/drivers/target/target_core_transport.c b/drivers/target/target_core_transport.c
index d931edf11c2b..7badc87e4bbe 100644
--- a/drivers/target/target_core_transport.c
+++ b/drivers/target/target_core_transport.c
@@ -246,6 +246,7 @@ struct se_session *transport_init_session(void)
INIT_LIST_HEAD(&se_sess->sess_cmd_list);
INIT_LIST_HEAD(&se_sess->sess_wait_list);
spin_lock_init(&se_sess->sess_cmd_lock);
+ kref_init(&se_sess->sess_kref);
return se_sess;
}
@@ -313,6 +314,27 @@ void transport_register_session(
}
EXPORT_SYMBOL(transport_register_session);
+static void target_release_session(struct kref *kref)
+{
+ struct se_session *se_sess = container_of(kref,
+ struct se_session, sess_kref);
+ struct se_portal_group *se_tpg = se_sess->se_tpg;
+
+ se_tpg->se_tpg_tfo->close_session(se_sess);
+}
+
+void target_get_session(struct se_session *se_sess)
+{
+ kref_get(&se_sess->sess_kref);
+}
+EXPORT_SYMBOL(target_get_session);
+
+int target_put_session(struct se_session *se_sess)
+{
+ return kref_put(&se_sess->sess_kref, target_release_session);
+}
+EXPORT_SYMBOL(target_put_session);
+
void transport_deregister_session_configfs(struct se_session *se_sess)
{
struct se_node_acl *se_nacl;