LU-13668 mdt: change lock mode for lease

[fs/lustre-release.git] / lustre / mdt / mdt_open.c

diff --git a/lustre/mdt/mdt_open.c b/lustre/mdt/mdt_open.c
index e211d36..5bbcd29 100644 (file)
--- a/lustre/mdt/mdt_open.c
+++ b/lustre/mdt/mdt_open.c
@@ -867,8 +867,8 @@ static int mdt_object_open_lock(struct mdt_thread_info *info,
                        GOTO(out, rc = -EPROTO);
                }
 
-               /* XXX: only exclusive open is supported. */
-               lm = LCK_EX;
+               /* should conflict with new opens for write/execute */
+               lm = LCK_PW;
                *ibits = MDS_INODELOCK_OPEN;
 
                /* never grant LCK_EX layout lock to client */
@@ -986,8 +986,11 @@ static int mdt_object_open_lock(struct mdt_thread_info *info,
                        PFID(mdt_object_fid(obj)),
                        atomic_read(&obj->mot_open_count), open_count);
 
-               if (atomic_read(&obj->mot_open_count) > open_count)
-                       GOTO(out, rc = -EBUSY);
+               if (atomic_read(&obj->mot_open_count) > open_count) {
+                       /* fail if anyone *else* has opened file for write */
+                       if (mdt_write_read(obj) > 1)
+                               GOTO(out, rc = -EBUSY);
+               }
        }
        GOTO(out, rc);