LU-1081 fid: define special FID for BFL

[fs/lustre-release.git] / lustre / fid / fid_store.c

diff --git a/lustre/fid/fid_store.c b/lustre/fid/fid_store.c
index 2226d5e..9ef70c6 100644 (file)
--- a/lustre/fid/fid_store.c
+++ b/lustre/fid/fid_store.c
@@ -28,6 +28,8 @@
 /*
  * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
  * Use is subject to license terms.
+ *
+ * Copyright (c) 2011, 2012, Whamcloud, Inc.
  */
 /*
  * This file is part of Lustre, http://www.lustre.org/
@@ -73,29 +75,31 @@ static struct lu_buf *seq_store_buf(struct seq_thread_info *info)
         return buf;
 }
 
-struct thandle *seq_store_trans_start(struct lu_server_seq *seq,
-                                      const struct lu_env *env, int credit,
-                                      int sync)
+struct seq_update_callback {
+        struct dt_txn_commit_cb suc_cb;
+        struct lu_server_seq   *suc_seq;
+};
+
+void seq_update_cb(struct lu_env *env, struct thandle *th,
+                   struct dt_txn_commit_cb *cb, int err)
+{
+        struct seq_update_callback *ccb;
+        ccb = container_of0(cb, struct seq_update_callback, suc_cb);
+        ccb->suc_seq->lss_need_sync = 0;
+        cfs_list_del(&ccb->suc_cb.dcb_linkage);
+        OBD_FREE_PTR(ccb);
+}
+
+struct thandle *seq_store_trans_create(struct lu_server_seq *seq,
+                                       const struct lu_env *env)
 {
-        struct seq_thread_info *info;
         struct dt_device *dt_dev;
-        struct thandle *th;
-        ENTRY;
 
         dt_dev = lu2dt_dev(seq->lss_obj->do_lu.lo_dev);
-        info = lu_context_key_get(&env->le_ctx, &seq_thread_key);
-        LASSERT(info != NULL);
-
-        txn_param_init(&info->sti_txn, credit);
-        if (sync)
-                txn_param_sync(&info->sti_txn);
-
-        th = dt_dev->dd_ops->dt_trans_start(env, dt_dev, &info->sti_txn);
-        return th;
+        return dt_trans_create(env, dt_dev);
 }
 
-void seq_store_trans_stop(struct lu_server_seq *seq,
-                          const struct lu_env *env,
+int seq_store_trans_start(struct lu_server_seq *seq, const struct lu_env *env,
                           struct thandle *th)
 {
         struct dt_device *dt_dev;
@@ -103,7 +107,39 @@ void seq_store_trans_stop(struct lu_server_seq *seq,
 
         dt_dev = lu2dt_dev(seq->lss_obj->do_lu.lo_dev);
 
-        dt_dev->dd_ops->dt_trans_stop(env, th);
+        return dt_trans_start(env, dt_dev, th);
+}
+
+int seq_update_cb_add(struct thandle *th, struct lu_server_seq *seq)
+{
+        struct seq_update_callback *ccb;
+        int rc;
+        OBD_ALLOC_PTR(ccb);
+        if (ccb == NULL)
+                return -ENOMEM;
+
+        ccb->suc_cb.dcb_func = seq_update_cb;
+        CFS_INIT_LIST_HEAD(&ccb->suc_cb.dcb_linkage);
+        ccb->suc_seq = seq;
+        seq->lss_need_sync = 1;
+        rc = dt_trans_cb_add(th, &ccb->suc_cb);
+        if (rc)
+                OBD_FREE_PTR(ccb);
+        return rc;
+}
+
+int seq_declare_store_write(struct lu_server_seq *seq,
+                            const struct lu_env *env,
+                            struct thandle *th)
+{
+        struct dt_object *dt_obj = seq->lss_obj;
+        int rc;
+        ENTRY;
+
+        rc = dt_obj->do_body_ops->dbo_declare_write(env, dt_obj,
+                                                    sizeof(struct lu_seq_range),
+                                                    0, th);
+        return rc;
 }
 
 /* This function implies that caller takes care about locking. */
@@ -113,12 +149,10 @@ int seq_store_write(struct lu_server_seq *seq,
 {
         struct dt_object *dt_obj = seq->lss_obj;
         struct seq_thread_info *info;
-        struct dt_device *dt_dev;
         loff_t pos = 0;
         int rc;
         ENTRY;
 
-        dt_dev = lu2dt_dev(seq->lss_obj->do_lu.lo_dev);
         info = lu_context_key_get(&env->le_ctx, &seq_thread_key);
         LASSERT(info != NULL);
 
@@ -143,31 +177,56 @@ int seq_store_write(struct lu_server_seq *seq,
 int seq_store_update(const struct lu_env *env, struct lu_server_seq *seq,
                      struct lu_seq_range *out, int sync)
 {
+        struct dt_device *dt_dev;
         struct thandle *th;
         int rc;
-        int credits = SEQ_TXN_STORE_CREDITS;
+        ENTRY;
 
-        if (out != NULL)
-                credits += FLD_TXN_INDEX_INSERT_CREDITS;
+        dt_dev = lu2dt_dev(seq->lss_obj->do_lu.lo_dev);
 
-        th = seq_store_trans_start(seq, env, credits, sync);
+        th = seq_store_trans_create(seq, env);
         if (IS_ERR(th))
                 RETURN(PTR_ERR(th));
 
+        rc = seq_declare_store_write(seq, env, th);
+        if (rc)
+                GOTO(exit, rc);
+
+        if (out != NULL) {
+                rc = fld_declare_server_create(seq->lss_site->ms_server_fld,
+                                               env, th);
+                if (rc)
+                        GOTO(exit, rc);
+        }
+
+        rc = seq_store_trans_start(seq, env, th);
+        if (rc)
+                GOTO(exit, rc);
+
         rc = seq_store_write(seq, env, th);
         if (rc) {
                 CERROR("%s: Can't write space data, rc %d\n",
                        seq->lss_name, rc);
+                GOTO(exit,rc);
         } else if (out != NULL) {
                 rc = fld_server_create(seq->lss_site->ms_server_fld,
                                        env, out, th);
                 if (rc) {
                         CERROR("%s: Can't Update fld database, rc %d\n",
                                seq->lss_name, rc);
+                        GOTO(exit,rc);
                 }
         }
 
-        seq_store_trans_stop(seq, env, th);
+        /* next sequence update will need sync until this update is committed
+         * in case of sync operation this is not needed obviously */
+        if (!sync)
+                /* if callback can't be added then sync always */
+                sync = !!seq_update_cb_add(th, seq);
+
+        th->th_sync |= sync;
+exit:
+        dt_trans_stop(env, dt_dev, th);
         return rc;
 }