From 3b51285196a7193f794c2982140a0af44e07bfdd Mon Sep 17 00:00:00 2001
From: tappro <tappro>
Date: Sun, 3 Sep 2006 19:48:30 +0000
Subject: [PATCH] put export in correct order, umount mdc obd devices while MDT
 umount

---
 lustre/cmm/cmm_device.c | 17 ++++++++---------
 lustre/cmm/mdc_device.c | 37 +++++++++++++++++++++++++++++++++----
 2 files changed, 41 insertions(+), 13 deletions(-)

diff --git a/lustre/cmm/cmm_device.c b/lustre/cmm/cmm_device.c
index a0a9476..2f27008 100644
--- a/lustre/cmm/cmm_device.c
+++ b/lustre/cmm/cmm_device.c
@@ -153,8 +153,7 @@ static int cmm_add_mdc(const struct lu_context *ctx,
                 lu_device_get(cmm2lu_dev(cm));
 
                 ls = cm->cmm_md_dev.md_lu_dev.ld_site;
-                fld_client_add_target(ls->ls_client_fld,
-                                      mc->mc_desc.cl_exp);
+                fld_client_add_target(ls->ls_client_fld, mc->mc_desc.cl_exp);
         }
         RETURN(rc);
 }
@@ -166,6 +165,13 @@ static void cmm_device_shutdown(const struct lu_context *ctx,
         struct lu_site *ls;
         ENTRY;
 
+        ls = cm->cmm_md_dev.md_lu_dev.ld_site;
+        if (ls->ls_client_fld != NULL) {
+                fld_client_fini(ls->ls_client_fld);
+                OBD_FREE_PTR(ls->ls_client_fld);
+                ls->ls_client_fld = NULL;
+        }
+
         /* finish all mdc devices */
         spin_lock(&cm->cmm_tgt_guard);
         list_for_each_entry_safe(mc, tmp, &cm->cmm_targets, mc_linkage) {
@@ -179,13 +185,6 @@ static void cmm_device_shutdown(const struct lu_context *ctx,
         }
         spin_unlock(&cm->cmm_tgt_guard);
 
-        ls = cm->cmm_md_dev.md_lu_dev.ld_site;
-        if (ls->ls_client_fld != NULL) {
-                fld_client_fini(ls->ls_client_fld);
-                OBD_FREE_PTR(ls->ls_client_fld);
-        }
-        ls->ls_client_fld = NULL;
-
         EXIT;
 }
 static int cmm_device_mount(const struct lu_context *ctx,
diff --git a/lustre/cmm/mdc_device.c b/lustre/cmm/mdc_device.c
index 930594f..65f47db 100644
--- a/lustre/cmm/mdc_device.c
+++ b/lustre/cmm/mdc_device.c
@@ -47,6 +47,18 @@ static inline int lu_device_is_mdc(struct lu_device *ld)
 
 static struct md_device_operations mdc_md_ops = { 0 };
 
+static int mdc_obd_update(struct obd_device *host,
+                          struct obd_device *watched,
+                          enum obd_notify_event ev, void *owner)
+{
+        struct mdc_device *mc = owner;
+        int rc = 0;
+        ENTRY;
+
+        LASSERT(mc != NULL);
+        CDEBUG(D_CONFIG, "notify %s ev=%d\n", watched->obd_name, ev);
+        RETURN(rc);
+}
 /* MDC OBD is set up already and connected to the proper MDS
  * mdc_add_obd() find that obd by uuid and connects to it.
  * Local MDT uuid is used for connection
@@ -56,7 +68,6 @@ static int mdc_add_obd(const struct lu_context *ctx,
 {
         struct mdc_cli_desc *desc = &mc->mc_desc;
         struct obd_device *mdc;
-        const char *srv = lustre_cfg_string(cfg, 0);
         const char *uuid_str = lustre_cfg_string(cfg, 1);
         const char *index = lustre_cfg_string(cfg, 2);
         const char *mdc_uuid_str = lustre_cfg_string(cfg, 4);
@@ -102,6 +113,15 @@ static int mdc_add_obd(const struct lu_context *ctx,
                         rc = obd_fid_init(desc->cl_exp);
                         if (rc)
                                 CERROR("fid init error %d \n", rc);
+                        else {
+                                /* obd notify mechanism */
+                                mdc->obd_upcall.onu_owner = mc;
+                                mdc->obd_upcall.onu_upcall = mdc_obd_update;
+                        }
+                }
+                if (rc) {
+                        obd_disconnect(desc->cl_exp);
+                        desc->cl_exp = NULL;
                 }
         }
 
@@ -111,22 +131,31 @@ static int mdc_add_obd(const struct lu_context *ctx,
 static int mdc_del_obd(struct mdc_device *mc)
 {
         struct mdc_cli_desc *desc = &mc->mc_desc;
+        struct obd_device *mdc_obd = class_exp2obd(desc->cl_exp);
         int rc;
 
         ENTRY;
 
         CDEBUG(D_CONFIG, "disconnect from %s\n",
-               class_exp2obd(desc->cl_exp)->obd_name);
+               mdc_obd->obd_name);
  
         rc = obd_fid_fini(desc->cl_exp);
         if (rc)
                 CERROR("fid init error %d \n", rc);
-       
+
+        obd_register_observer(mdc_obd, NULL);
+        
+        /*TODO: Give the same shutdown flags as we have */
+        /*
+        desc->cl_exp->exp_obd->obd_force = mdt_obd->obd_force;
+        desc->cl_exp->exp_obd->obd_fail = mdt_obd->obd_fail;
+        */
         rc = obd_disconnect(desc->cl_exp);
         if (rc) {
                 CERROR("target %s disconnect error %d\n",
-                       class_exp2obd(desc->cl_exp)->obd_name, rc);
+                       mdc_obd->obd_name, rc);
         }
+        class_manual_cleanup(mdc_obd);
         desc->cl_exp = NULL;
 
         RETURN(rc);
-- 
1.8.3.1