iscsi-target: Convert to use target_put_session + sess_kref
This patch converts iscsi-target session code to use se_sess->sess_kref
counting for iscsi session shutdown. The following cases include:
*) last iscsit_close_connection() shutdown path to invoke close session
*) iscsit_logout_post_handler_closesession() for explict logout
*) iscsit_free_session() caller for explict shutdown
It also moves iscsit_stop_session() call from lio_tpg_close_session()
into lio_tpg_shutdown_session() TFO callbacks to invoke an explict
shutdown, and also changes iscsi_check_for_session_reinstatement()
login code to use se_sess->sess_kref.
(v2: Make iscsit_handle_time2retain_timeout() use target_put_session)
Cc: Andy Grover <agrover@redhat.com>
Cc: Christoph Hellwig <hch@lst.de>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
diff --git a/drivers/target/iscsi/iscsi_target.c b/drivers/target/iscsi/iscsi_target.c
index c3ef2f6..d3b54ec 100644
--- a/drivers/target/iscsi/iscsi_target.c
+++ b/drivers/target/iscsi/iscsi_target.c
@@ -4168,7 +4168,7 @@
if (!atomic_read(&sess->session_reinstatement) &&
atomic_read(&sess->session_fall_back_to_erl0)) {
spin_unlock_bh(&sess->conn_lock);
- iscsit_close_session(sess);
+ target_put_session(sess->se_sess);
return 0;
} else if (atomic_read(&sess->session_logout)) {
@@ -4289,7 +4289,7 @@
iscsit_dec_conn_usage_count(conn);
iscsit_stop_session(sess, 1, 1);
iscsit_dec_session_usage_count(sess);
- iscsit_close_session(sess);
+ target_put_session(sess->se_sess);
}
static void iscsit_logout_post_handler_samecid(
@@ -4455,7 +4455,7 @@
} else
spin_unlock_bh(&sess->conn_lock);
- iscsit_close_session(sess);
+ target_put_session(sess->se_sess);
return 0;
}
diff --git a/drivers/target/iscsi/iscsi_target_configfs.c b/drivers/target/iscsi/iscsi_target_configfs.c
index dcef63b..1174f74 100644
--- a/drivers/target/iscsi/iscsi_target_configfs.c
+++ b/drivers/target/iscsi/iscsi_target_configfs.c
@@ -1698,8 +1698,8 @@
atomic_set(&sess->session_reinstatement, 1);
spin_unlock(&sess->conn_lock);
- iscsit_inc_session_usage_count(sess);
iscsit_stop_time2retain_timer(sess);
+ iscsit_stop_session(sess, 1, 1);
return 1;
}
@@ -1715,8 +1715,6 @@
* If the iSCSI Session for the iSCSI Initiator Node exists,
* forcefully shutdown the iSCSI NEXUS.
*/
- iscsit_stop_session(sess, 1, 1);
- iscsit_dec_session_usage_count(sess);
iscsit_close_session(sess);
}
diff --git a/drivers/target/iscsi/iscsi_target_erl0.c b/drivers/target/iscsi/iscsi_target_erl0.c
index 4784511..1ab0560 100644
--- a/drivers/target/iscsi/iscsi_target_erl0.c
+++ b/drivers/target/iscsi/iscsi_target_erl0.c
@@ -783,7 +783,7 @@
}
spin_unlock_bh(&se_tpg->session_lock);
- iscsit_close_session(sess);
+ target_put_session(sess->se_sess);
}
extern void iscsit_start_time2retain_handler(struct iscsi_session *sess)
diff --git a/drivers/target/iscsi/iscsi_target_login.c b/drivers/target/iscsi/iscsi_target_login.c
index 38cb7ce..18cffff 100644
--- a/drivers/target/iscsi/iscsi_target_login.c
+++ b/drivers/target/iscsi/iscsi_target_login.c
@@ -180,14 +180,16 @@
if (sess->session_state == TARG_SESS_STATE_FAILED) {
spin_unlock_bh(&sess->conn_lock);
iscsit_dec_session_usage_count(sess);
- return iscsit_close_session(sess);
+ target_put_session(sess->se_sess);
+ return 0;
}
spin_unlock_bh(&sess->conn_lock);
iscsit_stop_session(sess, 1, 1);
iscsit_dec_session_usage_count(sess);
- return iscsit_close_session(sess);
+ target_put_session(sess->se_sess);
+ return 0;
}
static void iscsi_login_set_conn_values(