From 721f9508f8a87fa6fdca851a231166ca336b9a24 Mon Sep 17 00:00:00 2001
From: tappro <tappro>
Date: Sun, 15 Oct 2006 08:26:40 +0000
Subject: [PATCH] - return back old split code but keep new one under #if 0 for
 now

---
 lustre/cmm/cmm_split.c | 101 +++++++++++++++++++++++++++++++++++++++++++++++--
 1 file changed, 98 insertions(+), 3 deletions(-)

diff --git a/lustre/cmm/cmm_split.c b/lustre/cmm/cmm_split.c
index b12a2bc4..c7ecfb9 100644
--- a/lustre/cmm/cmm_split.c
+++ b/lustre/cmm/cmm_split.c
@@ -84,8 +84,9 @@ cleanup:
 
 #define cmm_md_size(stripes) \
        (sizeof(struct lmv_stripe_md) + (stripes) * sizeof(struct lu_fid))
-
-static int cmm_alloc_slave_fids(const struct lu_env *env,
+#if 0
+/* Under discussion, disabled for now */
+static int cmm_slave_fids_alloc(const struct lu_env *env,
                                 struct cmm_device *cmm,
                                 struct lu_fid *fids)
 {
@@ -117,7 +118,43 @@ static int cmm_alloc_slave_fids(const struct lu_env *env,
         }
         RETURN(rc);
 }
+#else
+static int cmm_slave_fids_alloc(const struct lu_env *env,
+                                struct cmm_device *cmm,
+                                struct lu_fid *fids)
+{
+        struct  mdc_device *mc, *tmp;
+        int rc = 0, i = 0;
 
+        /* 
+         * XXX: In fact here would be nice to protect cmm->cmm_targets but we
+         * can't use spinlock here and do something complex is no time for that,
+         * especially taking into account that split will be removed after
+         * acceptance. So we suppose no changes to targets should happen this
+         * time.
+         */
+        list_for_each_entry_safe(mc, tmp, &cmm->cmm_targets, mc_linkage) {
+                /* Allocate slave fid on mds @mc->mc_num. */
+                rc = obd_fid_alloc(mc->mc_desc.cl_exp, &fids[i], NULL);
+                if (rc > 0) {
+                        struct lu_site *ls;
+
+                        ls = cmm->cmm_md_dev.md_lu_dev.ld_site;
+                        rc = fld_client_create(ls->ls_client_fld,
+                                               fid_seq(&fids[i]),
+                                               mc->mc_num, env);
+                        if (rc)
+                                CERROR("Can't create fld entry, rc %d\n", rc);
+                        
+                }
+                
+                if (rc < 0)
+                         break;
+                i++;
+         }
+         RETURN(rc);
+}
+#endif
 struct cmm_object *cmm_object_find(const struct lu_env *env,
                                    struct cmm_device *d,
                                    const struct lu_fid *f)
@@ -173,7 +210,7 @@ static int cmm_create_remote_obj(const struct lu_env *env,
         cmm_object_put(env, obj);
         RETURN(rc);
 }
-
+#if 0
 static int cmm_create_slave_objects(const struct lu_env *env,
                                     struct md_object *mo,
                                     struct md_attr *ma)
@@ -231,7 +268,65 @@ cleanup:
                 OBD_FREE_PTR(lmv);
         return rc;
 }
+#else
+static int cmm_create_slave_objects(const struct lu_env *env,
+                                    struct md_object *mo,
+                                    struct md_attr *ma)
+{
+        struct cmm_device *cmm = cmm_obj2dev(md2cmm_obj(mo));
+        struct lmv_stripe_md *lmv = NULL, *slave_lmv = NULL;
+        struct lu_fid *lf = cmm2fid(md2cmm_obj(mo));
+        int lmv_size, i, rc;
+        ENTRY;
 
+        lmv_size = cmm_md_size(cmm->cmm_tgt_count + 1);
+
+        /* This lmv will be free after finish splitting. */
+        OBD_ALLOC(lmv, lmv_size);
+        if (!lmv)
+                RETURN(-ENOMEM);
+
+        lmv->mea_master = cmm->cmm_local_num;
+        lmv->mea_magic = MEA_MAGIC_HASH_SEGMENT;
+        lmv->mea_count = cmm->cmm_tgt_count + 1;
+
+        /* Store master FID to local node idx number. */
+        lmv->mea_ids[0] = *lf;
+
+        /* Allocate slave fids and setup FLD for them. */
+        rc = cmm_slave_fids_alloc(env, cmm, lmv->mea_ids);
+        if (rc)
+                GOTO(cleanup, rc);
+
+        OBD_ALLOC_PTR(slave_lmv);
+        if (!slave_lmv)
+                GOTO(cleanup, rc = -ENOMEM);
+
+        slave_lmv->mea_master = cmm->cmm_local_num;
+        slave_lmv->mea_magic = MEA_MAGIC_HASH_SEGMENT;
+        slave_lmv->mea_count = 0;
+
+        for (i = 1; i < cmm->cmm_tgt_count + 1; i++) {
+                rc = cmm_create_remote_obj(env, cmm, &lmv->mea_ids[i], ma,
+                                           slave_lmv, sizeof(*slave_lmv));
+                if (rc)
+                        GOTO(cleanup, rc);
+        }
+
+        ma->ma_lmv_size = lmv_size;
+        ma->ma_lmv = lmv;
+        EXIT;
+cleanup:
+        if (slave_lmv)
+                OBD_FREE_PTR(slave_lmv);
+        if (rc && lmv) {
+                OBD_FREE(lmv, lmv_size);
+                ma->ma_lmv = NULL;
+                ma->ma_lmv_size = 0;
+        }
+        return rc;
+}
+#endif
 static int cmm_send_split_pages(const struct lu_env *env,
                                 struct md_object *mo,
                                 struct lu_rdpg *rdpg,
-- 
1.8.3.1