LU-3142 mdt: update mdt_max_mdsize in mdt_lvbo_size

during calling mdt_lvbo_size to get the size of lsm, mdt_max_mdsize
could be less than the lsm size of this object in failover mode.
then it is needed to check and update this value.

Test-Parameters: envdefinitions=RECOVERY_MDS_SCALE_EXCEPT=failover_ost \
clientdistro=el6 serverdistro=el6 clientarch=x86_64 serverarch=x86_64 \
clientcount=4 osscount=2 mdscount=2 austeroptions=-R failover=true \
useiscsi=true testlist=recovery-mds-scale

Change-Id: Id490c346ca9f34edcc963334e396678f1b41562c
Signed-off-by: Hongchao Zhang <hongchao.zhang@intel.com>
Signed-off-by: Jian Yu <jian.yu@intel.com>
Reviewed-on: http://review.whamcloud.com/6102
Tested-by: Hudson
Tested-by: Maloo <whamcloud.maloo@gmail.com>
Reviewed-by: Mike Pershin <mike.pershin@intel.com>
Reviewed-by: Fan Yong <fan.yong@intel.com>
Reviewed-by: Andreas Dilger <andreas.dilger@intel.com>
Reviewed-by: Oleg Drokin <oleg.drokin@intel.com>

diff --git a/lustre/mdt/mdt_handler.c b/lustre/mdt/mdt_handler.c
index f42fda5..53545e0 100644 (file)
--- a/lustre/mdt/mdt_handler.c
+++ b/lustre/mdt/mdt_handler.c
@@ -3720,6 +3720,9 @@ static int mdt_intent_layout(enum mdt_it_code opcode,
                             __u64 flags)
 {
        struct layout_intent *layout;
+       struct lu_fid *fid;
+       struct mdt_object *obj = NULL;
+       struct md_object *child = NULL;
        int rc;
        ENTRY;
 
@@ -3729,6 +3732,26 @@ static int mdt_intent_layout(enum mdt_it_code opcode,
                RETURN(-EINVAL);
        }
 
+       fid = &info->mti_tmp_fid2;
+       fid_build_from_res_name(fid, &(*lockp)->l_resource->lr_name);
+
+       obj = mdt_object_find(info->mti_env, info->mti_mdt, fid);
+       if (IS_ERR(obj))
+               RETURN(PTR_ERR(obj));
+
+       if (mdt_object_exists(obj) && !mdt_object_remote(obj)) {
+               child = mdt_object_child(obj);
+
+               /* get the length of lsm */
+               rc = mo_xattr_get(info->mti_env, child, &LU_BUF_NULL,
+                                 XATTR_NAME_LOV);
+
+               if (rc > info->mti_mdt->mdt_max_mdsize)
+                       info->mti_mdt->mdt_max_mdsize = rc;
+       }
+
+       mdt_object_put(info->mti_env, obj);
+
        (*lockp)->l_lvb_type = LVB_T_LAYOUT;
        req_capsule_set_size(info->mti_pill, &RMF_DLM_LVB, RCL_SERVER,
                        ldlm_lvbo_size(*lockp));