LU-8900 snapshot: user interface for write barrier on MDT

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

diff --git a/lustre/include/lustre/lustre_barrier_user.h b/lustre/include/lustre/lustre_barrier_user.h
index ba42281..e69bdc2 100644 (file)
--- a/lustre/include/lustre/lustre_barrier_user.h
+++ b/lustre/include/lustre/lustre_barrier_user.h
@@ -31,6 +31,18 @@
 #ifndef _LUSTRE_BARRIER_USER_H
 # define _LUSTRE_BARRIER_USER_H
 
+#include <lustre/lustre_user.h>
+
+#define BARRIER_VERSION_V1     1
+#define BARRIER_TIMEOUT_DEFAULT        30
+
+enum barrier_commands {
+       BC_FREEZE       = 1,
+       BC_THAW         = 2,
+       BC_STAT         = 3,
+       BC_RESCAN       = 4,
+};
+
 enum barrier_status {
        BS_INIT         = 0,
        BS_FREEZING_P1  = 1,
@@ -43,4 +55,19 @@ enum barrier_status {
        BS_RESCAN       = 8,
 };
 
+struct barrier_ctl {
+       __u32   bc_version;
+       __u32   bc_cmd;
+       union {
+               __s32   bc_timeout;
+               __u32   bc_total;
+       };
+       union {
+               __u32   bc_status;
+               __u32   bc_absence;
+       };
+       char    bc_name[12];
+       __u32   bc_padding;
+};
+
 #endif /* _LUSTRE_BARRIER_USER_H */