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scsi: iscsi: Fix iSCSI cls conn state 

In commit 9e67600ed6 ("scsi: iscsi: Fix race condition between login and
sync thread") I missed that libiscsi was now setting the iSCSI class state,
and that patch ended up resetting the state during conn stoppage and using
the wrong state value during ep_disconnect. This patch moves the setting of
the class state to the class module and then fixes the two issues above.

Link: https://lore.kernel.org/r/20210406171746.5016-1-michael.christie@oracle.com
Fixes: 9e67600ed6 ("scsi: iscsi: Fix race condition between login and sync thread")
Cc: Gulam Mohamed <gulam.mohamed@oracle.com>
Signed-off-by: Mike Christie <michael.christie@oracle.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Mike Christie 2021-04-06 12:17:46 -05:00 committed by Martin K. Petersen
parent 5cd0f6f576
commit 0dcf8febcb
2 changed files with 19 additions and 27 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

26
drivers/scsi/libiscsi.c
View File

@ -3179,9 +3179,10 @@ fail_mgmt_tasks(struct iscsi_session *session, struct iscsi_conn *conn)
}
}
static void iscsi_start_session_recovery(struct iscsi_session *session,
struct iscsi_conn *conn, int flag)
void iscsi_conn_stop(struct iscsi_cls_conn *cls_conn, int flag)
{
struct iscsi_conn *conn = cls_conn->dd_data;
struct iscsi_session *session = conn->session;
int old_stop_stage;
mutex_lock(&session->eh_mutex);
@ -3239,27 +3240,6 @@ static void iscsi_start_session_recovery(struct iscsi_session *session,
spin_unlock_bh(&session->frwd_lock);
mutex_unlock(&session->eh_mutex);
}
void iscsi_conn_stop(struct iscsi_cls_conn *cls_conn, int flag)
{
struct iscsi_conn *conn = cls_conn->dd_data;
struct iscsi_session *session = conn->session;
switch (flag) {
case STOP_CONN_RECOVER:
cls_conn->state = ISCSI_CONN_FAILED;
break;
case STOP_CONN_TERM:
cls_conn->state = ISCSI_CONN_DOWN;
break;
default:
iscsi_conn_printk(KERN_ERR, conn,
"invalid stop flag %d\n", flag);
return;
}
iscsi_start_session_recovery(session, conn, flag);
}
EXPORT_SYMBOL_GPL(iscsi_conn_stop);
int iscsi_conn_bind(struct iscsi_cls_session *cls_session,

20
drivers/scsi/scsi_transport_iscsi.c
View File

@ -2470,10 +2470,22 @@ static void iscsi_if_stop_conn(struct iscsi_cls_conn *conn, int flag)
* it works.
*/
mutex_lock(&conn_mutex);
conn->transport->stop_conn(conn, flag);
conn->state = ISCSI_CONN_DOWN;
mutex_unlock(&conn_mutex);
switch (flag) {
case STOP_CONN_RECOVER:
conn->state = ISCSI_CONN_FAILED;
break;
case STOP_CONN_TERM:
conn->state = ISCSI_CONN_DOWN;
break;
default:
iscsi_cls_conn_printk(KERN_ERR, conn,
"invalid stop flag %d\n", flag);
goto unlock;
}
conn->transport->stop_conn(conn, flag);
unlock:
mutex_unlock(&conn_mutex);
}
static void stop_conn_work_fn(struct work_struct *work)
@ -2961,7 +2973,7 @@ static int iscsi_if_ep_disconnect(struct iscsi_transport *transport,
mutex_lock(&conn->ep_mutex);
conn->ep = NULL;
mutex_unlock(&conn->ep_mutex);
conn->state = ISCSI_CONN_DOWN;
conn->state = ISCSI_CONN_FAILED;
}
transport->ep_disconnect(ep);