From 9faf87d0dde3bac074093ebd7ca4956297fef3ad Mon Sep 17 00:00:00 2001
From: alex <alex>
Date: Tue, 20 Oct 2009 11:31:24 +0000
Subject: [PATCH]  - declare write to lovobjids file

---
 lustre/mdd/mdd_trans.c |  4 +---
 lustre/mds/mds_lov.c   | 30 ++++++++++++++++++++++++++++++
 2 files changed, 31 insertions(+), 3 deletions(-)

diff --git a/lustre/mdd/mdd_trans.c b/lustre/mdd/mdd_trans.c
index f94d0de1..82cd1eb 100644
--- a/lustre/mdd/mdd_trans.c
+++ b/lustre/mdd/mdd_trans.c
@@ -80,9 +80,7 @@ int mdd_txn_start_cb(const struct lu_env *env, struct thandle *txn,
                (1 << shift) - 1) >> shift) + 1;
 
         /* add lov objids credits */
-        /*LBUG();
-                rc = fsfilt_write_record(obd, mds->mds_lov_objid_filp, data,
-                                         size, &off, 0);*/
+        mds_declare_lov_write_objids(env, obd, txn);
 
         return 0;
 }
diff --git a/lustre/mds/mds_lov.c b/lustre/mds/mds_lov.c
index 6d3de44..5a777ca 100644
--- a/lustre/mds/mds_lov.c
+++ b/lustre/mds/mds_lov.c
@@ -537,6 +537,36 @@ out2:
         RETURN(rc);
 }
 
+int mds_declare_lov_write_objids(const struct lu_env *env,
+                                 struct obd_device *obd,
+                                 struct thandle *th)
+{
+        struct mds_obd   *mds = &obd->u.mds;
+        struct dt_object *o;
+        int               len, rc = 0;
+        ENTRY;
+
+        if (mds->mds_next_dev == NULL)
+                RETURN(0);
+
+        o = mds->mds_lov_objid_dt;
+        if (o == NULL)
+                RETURN(0);
+
+        /* we don't know what specific data we'll be writing
+         * so let's declare full file to be updated -- not optimal */
+
+        /* XXX: if new OST gets connected after this declaration
+         * the thread will be able to write out of declared window
+         * if we remove batching the problem disappears */
+
+        len = (mds->mds_lov_objid_lastidx + 1) * sizeof(obd_id);
+        rc = dt_declare_record_write(env, o, len, 0, th);
+
+        RETURN(rc);
+}
+EXPORT_SYMBOL(mds_declare_lov_write_objids);
+
 int mds_lov_write_objids(const struct lu_env *env,
                          struct obd_device *obd,
                          struct thandle *th)
-- 
1.8.3.1