LU-64 define LOV default layout as FID_SEQ value

[fs/lustre-release.git] / lustre / mdd / mdd_object.c

diff --git a/lustre/mdd/mdd_object.c b/lustre/mdd/mdd_object.c
index 8f8a424..6cef918 100644 (file)
--- a/lustre/mdd/mdd_object.c
+++ b/lustre/mdd/mdd_object.c
@@ -599,7 +599,7 @@ int mdd_get_default_md(struct mdd_object *mdd_obj, struct lov_mds_md *lmm)
         LASSERT(ldesc != NULL);
 
         lum->lmm_magic = LOV_MAGIC_V1;
-        lum->lmm_object_seq = LOV_OBJECT_GROUP_DEFAULT;
+        lum->lmm_object_seq = FID_SEQ_LOV_DEFAULT;
         lum->lmm_pattern = ldesc->ld_pattern;
         lum->lmm_stripe_size = ldesc->ld_default_stripe_size;
         lum->lmm_stripe_count = ldesc->ld_default_stripe_count;
@@ -608,6 +608,14 @@ int mdd_get_default_md(struct mdd_object *mdd_obj, struct lov_mds_md *lmm)
         RETURN(sizeof(*lum));
 }
 
+static int is_rootdir(struct mdd_object *mdd_obj)
+{
+        const struct mdd_device *mdd_dev = mdd_obj2mdd_dev(mdd_obj);
+        const struct lu_fid *fid = mdo2fid(mdd_obj);
+
+        return lu_fid_eq(&mdd_dev->mdd_root_fid, fid);
+}
+
 /* get lov EA only */
 static int __mdd_lmm_get(const struct lu_env *env,
                          struct mdd_object *mdd_obj, struct md_attr *ma)
@@ -620,7 +628,7 @@ static int __mdd_lmm_get(const struct lu_env *env,
 
         rc = mdd_get_md(env, mdd_obj, ma->ma_lmm, &ma->ma_lmm_size,
                         XATTR_NAME_LOV);
-        if (rc == 0 && (ma->ma_need & MA_LOV_DEF))
+        if (rc == 0 && (ma->ma_need & MA_LOV_DEF) && is_rootdir(mdd_obj))
                 rc = mdd_get_default_md(mdd_obj, ma->ma_lmm);
         if (rc > 0) {
                 ma->ma_lmm_size = rc;
@@ -630,6 +638,34 @@ static int __mdd_lmm_get(const struct lu_env *env,
         RETURN(rc);
 }
 
+/* get the first parent fid from link EA */
+static int mdd_pfid_get(const struct lu_env *env,
+                        struct mdd_object *mdd_obj, struct md_attr *ma)
+{
+        struct lu_buf *buf;
+        struct link_ea_header *leh;
+        struct link_ea_entry *lee;
+        struct lu_fid *pfid = &ma->ma_pfid;
+        ENTRY;
+
+        if (ma->ma_valid & MA_PFID)
+                RETURN(0);
+
+        buf = mdd_links_get(env, mdd_obj);
+        if (IS_ERR(buf))
+                RETURN(PTR_ERR(buf));
+
+        leh = buf->lb_buf;
+        lee = (struct link_ea_entry *)(leh + 1);
+        memcpy(pfid, &lee->lee_parent_fid, sizeof(*pfid));
+        fid_be_to_cpu(pfid, pfid);
+        ma->ma_valid |= MA_PFID;
+        if (buf->lb_len > OBD_ALLOC_BIG)
+                /* if we vmalloced a large buffer drop it */
+                mdd_buf_put(buf);
+        RETURN(0);
+}
+
 int mdd_lmm_get_locked(const struct lu_env *env, struct mdd_object *mdd_obj,
                        struct md_attr *ma)
 {
@@ -726,6 +762,10 @@ int mdd_attr_get_internal(const struct lu_env *env, struct mdd_object *mdd_obj,
                     S_ISDIR(mdd_object_type(mdd_obj)))
                         rc = __mdd_lmm_get(env, mdd_obj, ma);
         }
+        if (rc == 0 && ma->ma_need & MA_PFID && !(ma->ma_valid & MA_LOV)) {
+                if (S_ISREG(mdd_object_type(mdd_obj)))
+                        rc = mdd_pfid_get(env, mdd_obj, ma);
+        }
         if (rc == 0 && ma->ma_need & MA_LMV) {
                 if (S_ISDIR(mdd_object_type(mdd_obj)))
                         rc = __mdd_lmv_get(env, mdd_obj, ma);
@@ -750,7 +790,7 @@ int mdd_attr_get_internal_locked(const struct lu_env *env,
 {
         int rc;
         int needlock = ma->ma_need &
-                       (MA_LOV | MA_LMV | MA_ACL_DEF | MA_HSM | MA_SOM);
+                       (MA_LOV | MA_LMV | MA_ACL_DEF | MA_HSM | MA_SOM | MA_PFID);
 
         if (needlock)
                 mdd_read_lock(env, mdd_obj, MOR_TGT_CHILD);
@@ -2337,7 +2377,7 @@ static int __mdd_readpage(const struct lu_env *env, struct mdd_object *obj,
                 /*
                  * end of directory.
                  */
-                hash_end = DIR_END_OFF;
+                hash_end = MDS_DIR_END_OFF;
                 rc = 0;
         }
         if (rc == 0) {
@@ -2394,7 +2434,7 @@ int mdd_readpage(const struct lu_env *env, struct md_object *obj,
                 dp = (struct lu_dirpage*)cfs_kmap(pg);
                 memset(dp, 0 , sizeof(struct lu_dirpage));
                 dp->ldp_hash_start = cpu_to_le64(rdpg->rp_hash);
-                dp->ldp_hash_end   = cpu_to_le64(DIR_END_OFF);
+                dp->ldp_hash_end   = cpu_to_le64(MDS_DIR_END_OFF);
                 dp->ldp_flags |= LDF_EMPTY;
                 dp->ldp_flags = cpu_to_le32(dp->ldp_flags);
                 cfs_kunmap(pg);