staging/lustre/mgc: check the import stat for lprocfs

in lprocfs_mgc_rd_ir_state, the import state should be checked
the validity before doing further work.

Signed-off-by: Hongchao Zhang <hongchao.zhang@intel.com>
Reviewed-on: http://review.whamcloud.com/12896
Intel-bug-id: https://jira.hpdd.intel.com/browse/LU-5650
Reviewed-by: Fan Yong <fan.yong@intel.com>
Reviewed-by: Niu Yawei <yawei.niu@intel.com>
Signed-off-by: Oleg Drokin <oleg.drokin@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/staging/lustre/lustre/mgc/mgc_request.c b/drivers/staging/lustre/lustre/mgc/mgc_request.c
index 0375bfe29a7de559d6aa638052fa300de2312137..3f00e775cbff0c1522ec8618f866afc80607bea0 100644 (file)
--- a/drivers/staging/lustre/lustre/mgc/mgc_request.c
+++ b/drivers/staging/lustre/lustre/mgc/mgc_request.c
@@ -452,10 +452,14 @@ static int config_log_end(char *logname, struct config_llog_instance *cfg)
 int lprocfs_mgc_rd_ir_state(struct seq_file *m, void *data)
 {
        struct obd_device       *obd = data;
-       struct obd_import       *imp = obd->u.cli.cl_import;
-       struct obd_connect_data *ocd = &imp->imp_connect_data;
+       struct obd_import       *imp;
+       struct obd_connect_data *ocd;
        struct config_llog_data *cld;
 
+       LPROCFS_CLIMP_CHECK(obd);
+       imp = obd->u.cli.cl_import;
+       ocd = &imp->imp_connect_data;
+
        seq_printf(m, "imperative_recovery: %s\n",
                      OCD_HAS_FLAG(ocd, IMP_RECOV) ? "ENABLED" : "DISABLED");
        seq_printf(m, "client_state:\n");
@@ -470,6 +474,7 @@ int lprocfs_mgc_rd_ir_state(struct seq_file *m, void *data)
        }
        spin_unlock(&config_list_lock);
 
+       LPROCFS_CLIMP_EXIT(obd);
        return 0;
 }
 #endif