LU-8753 osp: add rpc generation

[fs/lustre-release.git] / lustre / osp / osp_internal.h

diff --git a/lustre/osp/osp_internal.h b/lustre/osp/osp_internal.h
index f61b2f5..481932d 100644 (file)
--- a/lustre/osp/osp_internal.h
+++ b/lustre/osp/osp_internal.h
@@ -115,6 +115,7 @@ struct osp_update_request {
        struct osp_thandle              *our_th;
 
        __u64                           our_version;
+       __u64                           our_generation;
        /* protect our_list and flag */
        spinlock_t                      our_list_lock;
        /* linked to the list(ou_list) in osp_updates */
@@ -128,9 +129,22 @@ struct osp_updates {
        struct list_head        ou_list;
        spinlock_t              ou_lock;
        wait_queue_head_t       ou_waitq;
-       /* wait for next updates */
+
+       /* The next rpc version which supposed to be sent in
+        * osp_send_update_thread().*/
        __u64                   ou_rpc_version;
+
+       /* The rpc version assigned to the osp thandle during (osp_md_write()),
+        * which will be sent by this order. Note: the osp_thandle has be sent
+        * by this order to make sure the remote update log will follow the
+        * llog format rule. XXX: these probably should be removed once we
+        * invent new llog format */
        __u64                   ou_version;
+
+       /* The generation of current osp update RPC, which is used to make sure
+        * those stale RPC(with older generation) will not be sent, otherwise it
+        * will cause update lllog corruption */
+       __u64                   ou_generation;
 };
 
 struct osp_device {