LU-1592 ldlm: protect obd_export:exp_imp_reverse's change

[fs/lustre-release.git] / lustre / include / lustre_export.h

diff --git a/lustre/include/lustre_export.h b/lustre/include/lustre_export.h
index a0740c7..8dec5f2 100644 (file)
--- a/lustre/include/lustre_export.h
+++ b/lustre/include/lustre_export.h
@@ -202,7 +202,10 @@ struct obd_export {
         cfs_list_t                exp_obd_chain_timed;
         /** Obd device of this export */
         struct obd_device        *exp_obd;
-        /** "reverse" import to send requests (e.g. from ldlm) back to client */
+       /**
+        * "reverse" import to send requests (e.g. from ldlm) back to client
+        * exp_lock protect its change
+        */
         struct obd_import        *exp_imp_reverse;
         struct nid_stat          *exp_nid_stats;
         struct lprocfs_stats     *exp_md_stats;
@@ -226,7 +229,10 @@ struct obd_export {
         cfs_time_t                exp_last_request_time;
         /** On replay all requests waiting for replay are linked here */
         cfs_list_t                exp_req_replay_queue;
-        /** protects exp_flags and exp_outstanding_replies */
+       /**
+        * protects exp_flags, exp_outstanding_replies and the change
+        * of exp_imp_reverse
+        */
         cfs_spinlock_t            exp_lock;
         /** Compatibility flags for this export */
         __u64                     exp_connect_flags;
@@ -247,7 +253,10 @@ struct obd_export {
                                   exp_libclient:1, /* liblustre client? */
                                   /* client timed out and tried to reconnect,
                                    * but couldn't because of active rpcs */
-                                  exp_abort_active_req:1;
+                                 exp_abort_active_req:1,
+                                 /* if to swap nidtbl entries for 2.2 clients.
+                                  * Only used by the MGS to fix LU-1644. */
+                                 exp_need_mne_swab:1;
         /* also protected by exp_lock */
         enum lustre_sec_part      exp_sp_peer;
         struct sptlrpc_flavor     exp_flvr;             /* current */