LU-3285 lov: add MDT target to the LOV device

[fs/lustre-release.git] / lustre / lov / lov_cl_internal.h

diff --git a/lustre/lov/lov_cl_internal.h b/lustre/lov/lov_cl_internal.h
index ca40cc8..f97747d 100644 (file)
--- a/lustre/lov/lov_cl_internal.h
+++ b/lustre/lov/lov_cl_internal.h
@@ -91,6 +91,12 @@ enum lov_device_flags {
  * Upper half.
  */
 
+/* Data-on-MDT array item in lov_device::ld_md_tgts[] */
+struct lovdom_device {
+       struct cl_device        *ldm_mdc;
+       int                      ldm_idx;
+};
+
 struct lov_device {
         /*
          * XXX Locking of lov-private data is missing.
@@ -101,6 +107,13 @@ struct lov_device {
         __u32                     ld_target_nr;
         struct lovsub_device    **ld_target;
         __u32                     ld_flags;
+
+       /* Data-on-MDT devices */
+       __u32                     ld_md_tgts_nr;
+       struct lovdom_device     *ld_md_tgts;
+       struct obd_device        *ld_lmv;
+       /* LU site for subdevices */
+       struct lu_site            ld_site;
 };
 
 /**
@@ -129,6 +142,34 @@ static inline char *llt2str(enum lov_layout_type llt)
        return "";
 }
 
+/**
+ * Return lov_layout_entry_type associated with a given composite layout
+ * entry.
+ */
+static inline __u32 lov_entry_type(struct lov_stripe_md_entry *lsme)
+{
+       if ((lov_pattern(lsme->lsme_pattern) == LOV_PATTERN_RAID0) ||
+           (lov_pattern(lsme->lsme_pattern) == LOV_PATTERN_MDT))
+               return lov_pattern(lsme->lsme_pattern);
+       return 0;
+}
+
+struct lov_layout_entry;
+struct lov_object;
+struct lov_lock_sub;
+
+struct lov_comp_layout_entry_ops {
+       int (*lco_init)(const struct lu_env *env, struct lov_device *dev,
+                       struct lov_object *lov, unsigned int index,
+                       const struct cl_object_conf *conf,
+                       struct lov_layout_entry *lle);
+       void (*lco_fini)(const struct lu_env *env,
+                        struct lov_layout_entry *lle);
+       int  (*lco_getattr)(const struct lu_env *env, struct lov_object *obj,
+                           unsigned int index, struct lov_layout_entry *lle,
+                           struct cl_attr **attr);
+};
+
 struct lov_layout_raid0 {
        unsigned               lo_nr;
        /**
@@ -165,6 +206,25 @@ struct lov_layout_raid0 {
        struct cl_attr         lo_attr;
 };
 
+struct lov_layout_dom {
+       /* keep this always at first place so DOM layout entry
+        * can be addressed also as RAID0 after initialization.
+        */
+       struct lov_layout_raid0 lo_dom_r0;
+       struct lovsub_object *lo_dom;
+       struct lov_oinfo *lo_loi;
+};
+
+struct lov_layout_entry {
+       __u32 lle_type;
+       struct lu_extent lle_extent;
+       struct lov_comp_layout_entry_ops *lle_comp_ops;
+       union {
+               struct lov_layout_raid0 lle_raid0;
+               struct lov_layout_dom lle_dom;
+       };
+};
+
 /**
  * lov-specific file state.
  *
@@ -180,7 +240,7 @@ struct lov_layout_raid0 {
  * function corresponding to the current layout type.
  */
 struct lov_object {
-       struct cl_object       lo_cl;
+       struct cl_object        lo_cl;
        /**
         * Serializes object operations with transitions between layout types.
         *
@@ -220,13 +280,10 @@ struct lov_object {
                } released;
                struct lov_layout_composite {
                        /**
-                        * Current valid entry count of lo_entries.
+                        * Current valid entry count of entries.
                         */
                        unsigned int lo_entry_count;
-                       struct lov_layout_entry {
-                               struct lu_extent lle_extent;
-                               struct lov_layout_raid0 lle_raid0;
-                       } *lo_entries;
+                       struct lov_layout_entry *lo_entries;
                } composite;
        } u;
        /**
@@ -634,6 +691,15 @@ static inline struct lov_thread_info *lov_env_info(const struct lu_env *env)
         return info;
 }
 
+static inline struct lov_layout_entry *lov_entry(struct lov_object *lov, int i)
+{
+       LASSERT(lov->lo_type == LLT_COMP);
+       LASSERTF(i < lov->u.composite.lo_entry_count,
+                "entry %d entry_count %d", i, lov->u.composite.lo_entry_count);
+
+       return &lov->u.composite.lo_entries[i];
+}
+
 static inline struct lov_layout_raid0 *lov_r0(struct lov_object *lov, int i)
 {
        LASSERT(lov->lo_type == LLT_COMP);