LU-11376 lov: new foreign LOV format

[fs/lustre-release.git] / lustre / lov / lov_object.c

diff --git a/lustre/lov/lov_object.c b/lustre/lov/lov_object.c
index 200f943..884f744 100644 (file)
--- a/lustre/lov/lov_object.c
+++ b/lustre/lov/lov_object.c
@@ -811,10 +811,25 @@ static int lov_init_released(const struct lu_env *env,
        return 0;
 }
 
+static int lov_init_foreign(const struct lu_env *env,
+                           struct lov_device *dev, struct lov_object *lov,
+                           struct lov_stripe_md *lsm,
+                           const struct cl_object_conf *conf,
+                           union lov_layout_state *state)
+{
+       LASSERT(lsm != NULL);
+       LASSERT(lov->lo_type == LLT_FOREIGN);
+       LASSERT(lov->lo_lsm == NULL);
+
+       lov->lo_lsm = lsm_addref(lsm);
+       return 0;
+}
+
 static int lov_delete_empty(const struct lu_env *env, struct lov_object *lov,
                            union lov_layout_state *state)
 {
-       LASSERT(lov->lo_type == LLT_EMPTY || lov->lo_type == LLT_RELEASED);
+       LASSERT(lov->lo_type == LLT_EMPTY || lov->lo_type == LLT_RELEASED ||
+               lov->lo_type == LLT_FOREIGN);
 
        lov_layout_wait(env, lov);
        return 0;
@@ -936,6 +951,23 @@ static int lov_print_released(const struct lu_env *env, void *cookie,
        return 0;
 }
 
+static int lov_print_foreign(const struct lu_env *env, void *cookie,
+                               lu_printer_t p, const struct lu_object *o)
+{
+       struct lov_object       *lov = lu2lov(o);
+       struct lov_stripe_md    *lsm = lov->lo_lsm;
+
+       (*p)(env, cookie,
+               "foreign: %s, lsm{%p 0x%08X %d %u}:\n",
+               lov->lo_layout_invalid ? "invalid" : "valid", lsm,
+               lsm->lsm_magic, atomic_read(&lsm->lsm_refc),
+               lsm->lsm_layout_gen);
+       (*p)(env, cookie,
+               "raw_ea_content '%.*s'\n",
+               (int)lsm->lsm_foreign_size, (char *)lsm_foreign(lsm));
+       return 0;
+}
+
 /**
  * Implements cl_object_operations::coo_attr_get() method for an object
  * without stripes (LLT_EMPTY layout type).
@@ -1034,6 +1066,16 @@ const static struct lov_layout_operations lov_dispatch[] = {
                .llo_io_init   = lov_io_init_composite,
                .llo_getattr   = lov_attr_get_composite,
        },
+       [LLT_FOREIGN] = {
+               .llo_init      = lov_init_foreign,
+               .llo_delete    = lov_delete_empty,
+               .llo_fini      = lov_fini_released,
+               .llo_print     = lov_print_foreign,
+               .llo_page_init = lov_page_init_foreign,
+               .llo_lock_init = lov_lock_init_empty,
+               .llo_io_init   = lov_io_init_empty,
+               .llo_getattr   = lov_attr_get_empty,
+       },
 };
 
 /**
@@ -1065,6 +1107,9 @@ static enum lov_layout_type lov_type(struct lov_stripe_md *lsm)
            lsm->lsm_magic == LOV_MAGIC_COMP_V1)
                return LLT_COMP;
 
+       if (lsm->lsm_magic == LOV_MAGIC_FOREIGN)
+               return LLT_FOREIGN;
+
        return LLT_EMPTY;
 }
 
@@ -2136,6 +2181,8 @@ int lov_read_and_clear_async_rc(struct cl_object *clob)
                }
                case LLT_RELEASED:
                case LLT_EMPTY:
+                       /* fall through */
+               case LLT_FOREIGN:
                        break;
                default:
                        LBUG();