staging/lustre/ldlm: fix export reference problem

1, in client_import_del_conn, the export returned from
   class_conn2export is not released after using it.

2, in ptlrpc_connect_interpret, the export is not released
   if the connect_flags isn't compatible.

Signed-off-by: Hongchao Zhang <hongchao.zhang@intel.com>
Reviewed-on: http://review.whamcloud.com/22031
Intel-bug-id: https://jira.hpdd.intel.com/browse/LU-8500
Reviewed-by: James Simmons <uja.ornl@yahoo.com>
Reviewed-by: Bobi Jam <bobijam@hotmail.com>
Signed-off-by: Oleg Drokin <green@linuxhacker.ru>
Reviewed-by: James Simmons <jsimmons@infradead.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/staging/lustre/lustre/ldlm/ldlm_lib.c b/drivers/staging/lustre/lustre/ldlm/ldlm_lib.c
index 4f9480e..06d3cc6 100644 (file)
--- a/drivers/staging/lustre/lustre/ldlm/ldlm_lib.c
+++ b/drivers/staging/lustre/lustre/ldlm/ldlm_lib.c
@@ -170,6 +170,9 @@ int client_import_del_conn(struct obd_import *imp, struct obd_uuid *uuid)
                                ptlrpc_connection_put(dlmexp->exp_connection);
                                dlmexp->exp_connection = NULL;
                        }
+
+                       if (dlmexp)
+                               class_export_put(dlmexp);
                }
 
                list_del(&imp_conn->oic_item);

diff --git a/drivers/staging/lustre/lustre/ptlrpc/import.c b/drivers/staging/lustre/lustre/ptlrpc/import.c
index 46ba5a4..05fd92d 100644 (file)
--- a/drivers/staging/lustre/lustre/ptlrpc/import.c
+++ b/drivers/staging/lustre/lustre/ptlrpc/import.c
@@ -972,6 +972,16 @@ static int ptlrpc_connect_interpret(const struct lu_env *env,
 
        spin_unlock(&imp->imp_lock);
 
+       if (!exp) {
+               /* This could happen if export is cleaned during the
+                * connect attempt
+                */
+               CERROR("%s: missing export after connect\n",
+                      imp->imp_obd->obd_name);
+               rc = -ENODEV;
+               goto out;
+       }
+
        /* check that server granted subset of flags we asked for. */
        if ((ocd->ocd_connect_flags & imp->imp_connect_flags_orig) !=
            ocd->ocd_connect_flags) {
@@ -982,15 +992,6 @@ static int ptlrpc_connect_interpret(const struct lu_env *env,
                goto out;
        }
 
-       if (!exp) {
-               /* This could happen if export is cleaned during the
-                * connect attempt
-                */
-               CERROR("%s: missing export after connect\n",
-                      imp->imp_obd->obd_name);
-               rc = -ENODEV;
-               goto out;
-       }
        old_connect_flags = exp_connect_flags(exp);
        exp->exp_connect_data = *ocd;
        imp->imp_obd->obd_self_export->exp_connect_data = *ocd;