LU-7815 mdt: pinger should not evict MDT-MDT export

[fs/lustre-release.git] / lustre / osc / osc_object.c

diff --git a/lustre/osc/osc_object.c b/lustre/osc/osc_object.c
index f840257..c233d13 100644 (file)
--- a/lustre/osc/osc_object.c
+++ b/lustre/osc/osc_object.c
@@ -27,7 +27,7 @@
  * Copyright (c) 2008, 2010, Oracle and/or its affiliates. All rights reserved.
  * Use is subject to license terms.
  *
- * Copyright (c) 2011, 2014, Intel Corporation.
+ * Copyright (c) 2011, 2015, Intel Corporation.
  */
 /*
  * This file is part of Lustre, http://www.lustre.org/
@@ -97,6 +97,9 @@ static int osc_object_init(const struct lu_env *env, struct lu_object *obj,
        spin_lock_init(&osc->oo_ol_spin);
        INIT_LIST_HEAD(&osc->oo_ol_list);
 
+       atomic_set(&osc->oo_nr_ios, 0);
+       init_waitqueue_head(&osc->oo_io_waitq);
+
        cl_object_page_init(lu2cl(obj), sizeof(struct osc_page));
 
        return 0;
@@ -119,6 +122,7 @@ static void osc_object_free(const struct lu_env *env, struct lu_object *obj)
        LASSERT(atomic_read(&osc->oo_nr_reads) == 0);
        LASSERT(atomic_read(&osc->oo_nr_writes) == 0);
        LASSERT(list_empty(&osc->oo_ol_list));
+       LASSERT(atomic_read(&osc->oo_nr_ios) == 0);
 
        lu_object_fini(obj);
        OBD_SLAB_FREE_PTR(osc, osc_object_kmem);
@@ -210,10 +214,6 @@ static int osc_object_prune(const struct lu_env *env, struct cl_object *obj)
        struct osc_object       *osc = cl2osc(obj);
        struct ldlm_res_id      *resname = &osc_env_info(env)->oti_resname;
 
-       LASSERTF(osc->oo_npages == 0,
-                DFID "still have %lu pages, obj: %p, osc: %p\n",
-                PFID(lu_object_fid(&obj->co_lu)), osc->oo_npages, obj, osc);
-
        /* DLM locks don't hold a reference of osc_object so we have to
         * clear it before the object is being destroyed. */
        ostid_build_res_name(&osc->oo_oinfo->loi_oi, resname);
@@ -370,6 +370,77 @@ int osc_object_is_contended(struct osc_object *obj)
         return 1;
 }
 
+/**
+ * Implementation of struct cl_object_operations::coo_req_attr_set() for osc
+ * layer. osc is responsible for struct obdo::o_id and struct obdo::o_seq
+ * fields.
+ */
+static void osc_req_attr_set(const struct lu_env *env, struct cl_object *obj,
+                            struct cl_req_attr *attr)
+{
+       struct lov_oinfo *oinfo;
+       struct obdo      *oa;
+       struct ost_lvb   *lvb;
+       u64               flags = attr->cra_flags;
+
+       oinfo   = cl2osc(obj)->oo_oinfo;
+       lvb     = &oinfo->loi_lvb;
+       oa      = attr->cra_oa;
+
+       if ((flags & OBD_MD_FLMTIME) != 0) {
+               oa->o_mtime = lvb->lvb_mtime;
+               oa->o_valid |= OBD_MD_FLMTIME;
+       }
+       if ((flags & OBD_MD_FLATIME) != 0) {
+               oa->o_atime = lvb->lvb_atime;
+               oa->o_valid |= OBD_MD_FLATIME;
+       }
+       if ((flags & OBD_MD_FLCTIME) != 0) {
+               oa->o_ctime = lvb->lvb_ctime;
+               oa->o_valid |= OBD_MD_FLCTIME;
+       }
+       if (flags & OBD_MD_FLGROUP) {
+               ostid_set_seq(&oa->o_oi, ostid_seq(&oinfo->loi_oi));
+               oa->o_valid |= OBD_MD_FLGROUP;
+       }
+       if (flags & OBD_MD_FLID) {
+               ostid_set_id(&oa->o_oi, ostid_id(&oinfo->loi_oi));
+               oa->o_valid |= OBD_MD_FLID;
+       }
+       if (flags & OBD_MD_FLHANDLE) {
+               struct ldlm_lock *lock;
+               struct osc_page *opg;
+
+               opg = osc_cl_page_osc(attr->cra_page, cl2osc(obj));
+               lock = osc_dlmlock_at_pgoff(env, cl2osc(obj), osc_index(opg),
+                               OSC_DAP_FL_TEST_LOCK | OSC_DAP_FL_CANCELING);
+               if (lock == NULL && !opg->ops_srvlock) {
+                       struct ldlm_resource *res;
+                       struct ldlm_res_id *resname;
+
+                       CL_PAGE_DEBUG(D_ERROR, env, attr->cra_page,
+                                     "uncovered page!\n");
+
+                       resname = &osc_env_info(env)->oti_resname;
+                       ostid_build_res_name(&oinfo->loi_oi, resname);
+                       res = ldlm_resource_get(
+                               osc_export(cl2osc(obj))->exp_obd->obd_namespace,
+                               NULL, resname, LDLM_EXTENT, 0);
+                       ldlm_resource_dump(D_ERROR, res);
+
+                       libcfs_debug_dumpstack(NULL);
+                       LBUG();
+               }
+
+               /* check for lockless io. */
+               if (lock != NULL) {
+                       oa->o_handle = lock->l_remote_handle;
+                       oa->o_valid |= OBD_MD_FLHANDLE;
+                       LDLM_LOCK_PUT(lock);
+               }
+       }
+}
+
 static const struct cl_object_operations osc_ops = {
        .coo_page_init    = osc_page_init,
        .coo_lock_init    = osc_lock_init,
@@ -380,6 +451,7 @@ static const struct cl_object_operations osc_ops = {
        .coo_prune        = osc_object_prune,
        .coo_find_cbdata  = osc_object_find_cbdata,
        .coo_fiemap       = osc_object_fiemap,
+       .coo_req_attr_set = osc_req_attr_set
 };
 
 static const struct lu_object_operations osc_lu_obj_ops = {
@@ -408,4 +480,26 @@ struct lu_object *osc_object_alloc(const struct lu_env *env,
        return obj;
 }
 
+int osc_object_invalidate(const struct lu_env *env, struct osc_object *osc)
+{
+       struct l_wait_info lwi = { 0 };
+       ENTRY;
+
+       CDEBUG(D_INODE, "Invalidate osc object: %p, # of active IOs: %d\n",
+              osc, atomic_read(&osc->oo_nr_ios));
+
+       l_wait_event(osc->oo_io_waitq, atomic_read(&osc->oo_nr_ios) == 0, &lwi);
+
+       /* Discard all dirty pages of this object. */
+       osc_cache_truncate_start(env, osc, 0, NULL);
+
+       /* Discard all caching pages */
+       osc_lock_discard_pages(env, osc, 0, CL_PAGE_EOF, CLM_WRITE);
+
+       /* Clear ast data of dlm lock. Do this after discarding all pages */
+       osc_object_prune(env, osc2cl(osc));
+
+       RETURN(0);
+}
+
 /** @} osc */